It’s Summer, America’s Heating Up, and We’re Even More Unprepared

Summer officially kicked off this past weekend with the onset of a sweltering heat wave. As we hit publish on this piece, tens of millions of Americans across the central and eastern United States are experiencing sweltering temperatures that make it dangerous to work, play, or just hang out outdoors.

The good news is that even when the mercury climbs, heat illness, injury, and death are preventable. The bad news is that over the past five months, the Trump administration has dismantled essential preventative capabilities.

At the beginning of this year, more than 70 organizations rallied around a common-sense Heat Policy Agenda to tackle this growing whole-of-nation crisis. Since then, we’ve seen some encouraging progress. The new Congressional Extreme Heat Caucus presents an avenue for bipartisan progress on securing resources and legislative wins. Recommendations from the Heat Policy Agenda have already been echoed in multiple introduced bills. Four states, California, Arizona, New Jersey, and New York, now have whole-of-government heat action plans, and there are several States with plans in development. More locally, mayors are banding together to identify heat preparedness, management, and resilience solutions. FAS highlighted examples of how leaders and communities across the country are beating the heat in a Congressional briefing just last week.

But these steps in the right direction are being forestalled by the Trump Administration’s leap backwards on heat. The Heat Policy Agenda emphasized the importance of a clear, sustained federal governance structure for heat, named authorities and dedicated resourcing for federal agencies responsible for extreme heat management, and funding and technical assistance to subnational governments to build their heat readiness. The Trump Administration has not only failed to advance these goals – it has taken actions that clearly work against them.

The result? It’s summer, America’s heating up, and we’re deeply unprepared.

The heat wave making headlines today is just the latest example of how extreme heat is a growing problem for all 50 states. In just the past month, the Pacific Northwest smashed early-summer temperature records, there were days when parts of Texas were the hottest places on Earth, and Alaska – yes, Alaska – issued its first-ever heat advisory. Extreme heat is deadlier than hurricanes, floods, and tornadoes combined, and is exacerbating a mental-health crisis as well. By FAS’ estimates, extreme heat costs the nation more than $162 billion annually, costs that have made extreme heat a growing concern to private markets.

To build a common understanding of the state of federal heat infrastructure, we analyzed the status of heat-critical programs and agencies through public media, government reports, and conversations with stakeholders. All known impacts are confirmed via publicly available sources. We highlight five areas where federal capacity has been impacted:

This work provides answers to many of the questions our team has been asked over the last few months about what heat work continues at the federal level. With this grounding, we close with some options and opportunities for subnational governments to consider heading into Summer 2025.

What is the Current State of Federal Capacity on Extreme Heat?

Loss of leadership and governance infrastructure

At the time of publication, all but one of the co-chairs for the National Integrated Heat Health Information System’s (NIHHIS) Interagency Working Group (IWG) have either taken an early retirement offer or have been impacted by reductions in force. The co-chairs represented NIHHIS, the National Weather Service (NWS), Health and Human Services (HHS), and the Federal Emergency Management Agency (FEMA). The National Heat Strategy, a whole-of-government vision for heat governance crafted by 28 agencies through the NIHHIS IWG, was also taken offline. A set of agency-by-agency tasks for Strategy implementation (to build short-term readiness for upcoming heat seasons, as well as to strengthen long-term preparedness) was in development as of early 2025, but this work has stalled. There was also a goal to formalize NIHHIS via legislation, given that its existence is not mandated by law – relevant legislation has been introduced but its path forward is unclear. Staff remain at NIHHIS and are continuing the work to manage the heat.gov website, craft heat resources and information, and disseminate public communications like Heat Beat Newsletter and Heat Safety Week. Their positions could be eliminated if proposed budget cuts to the National Oceanic and Atmospheric Administration (NOAA) are approved by Congress.

Staffing reductions and actualized or proposed changes to FEMA and HHS, the federal disaster management agencies implicated in addressing extreme heat, are likely to be consequential in relation to extreme heat this summer. Internal reports have found that FEMA is not ready for responding to even well-recognized disasters like hurricanes, increasing the risk for a mismanaged response to an unprecedented heat disaster. The loss of key leaders at FEMA has also put a pause to efforts to integrate extreme heat within agency functions, such as efforts to make extreme heat an eligible disaster. FEMA is also proposing changes that will make it more difficult to receive federal disaster assistance. The Administration for Strategic Preparedness and Response (ASPR), HHS’ response arm, has been folded into the Centers for Disease Control and Prevention (CDC), which has been refocused to focus solely on infectious diseases. There is still little public information for what this merger means for HHS’ implementation of the Public Health Service Act, which requires an all-hazards approach to public health emergency management. Prior to January 2025, HHS was determining how it could use the Public Health Emergency authority to respond to extreme heat.

Loss of key personnel and their expertise

Many key agencies involved in NIHHIS, and extreme heat management more broadly, have been impacted by reductions in force and early retirements, including NOAA, FEMA, HHS, the Department of Housing and Urban Development (HUD), the Environmental Protection Agency (EPA), the U.S. Forest Service (USFS), and the Department of Energy (DOE). Some key agencies, like FEMA, have lost or will lose almost 2,000 staff. As more statutory responsibilities are put on fewer workers, efforts to advance “beyond scope” activities, like taking action on extreme heat, will likely be on the back burner.

Downsizing at HHS has been acutely devastating to extreme heat work. In January, the Office of Climate Change and Health Equity (OCCHE) was eliminated, putting a pause on HHS-wide coordination on extreme heat and the new Extreme Heat Working Group. In April, the entire staff of the Climate and Health program at CDC, the Low Income Home Energy Assistance Program (LIHEAP), and all of the staff at the National Institute for Occupational Safety and Health (NIOSH) working on extreme heat, received reduction in force notices. While it appears that staff are returning to the CDC’s National Center for Environmental Health, they have lost months of time that could have been spent on preparedness, tool development, and technical assistance to local and state public health departments. Sustained funding for extreme heat programs at HHS is under threat, the FY2026 budget for HHS formally eliminates the CDC’s Climate and Health Program, all NIOSH efforts on extreme heat, and LIHEAP.

Risks to data, forecasts, and information availability, though some key tools remain online

Staff reductions at NWS have compromised local forecasts and warnings, and some offices can no longer staff around-the-clock surveillance. Staff reductions have also compromised weather balloon launches, which collect key temperature data for making heat forecasts. Remaining staff at the NWS are handling an increased workload at one of the busiest times of the year for weather forecasting. Reductions in force, while now reversed, have impacted real-time heat-health surveillance at the CDC, where daily heat-related illness counts have been on pause since May 21, 2025 and the site is not currently being maintained as of the date of this publication.

Some tools remain online and available to use this summer, including NWS/CDC’s HeatRisk (a 7-day forecast of health-informed heat risks) and the National Highway Traffic Safety Administration’s Heat-Related EMS Activation Surveillance Dashboard (which shows the number of heat-related EMS activations, time to patient, percent transported to medical facilities, and deaths). Most of the staff that built HeatRisk have been impacted by reductions in force. The return of staff to the CDC’s Climate and Health program is a bright spot, and could bode well for the tool’s ongoing operations and maintenance for Summer 2025.

Proposed cuts in the FY26 budget will continue to compromise heat forecasting and data. The budget proposes cutting budgets for upkeep of NOAA satellites crucial to tracking extreme weather events like extreme heat; cutting budgets for the National Aeronautics and Space Administration’s LandSat program, which is used widely by researchers and private sector companies to analyze surface temperatures and understand heat’s risks; and fully defunding the National Environmental Public Health Tracking Network, which funds local and state public health departments to collect heat-health illness and death data and federal staff to analyze it.

Rollbacks in key funding sources and programs for preparedness, risk mitigation and resilience

As of May 2025, both NIHHIS Centers of Excellence – the Center for Heat Resilient Communities and the Center for Collaborative Heat Monitoring – received stop work orders and total pauses in federal funding. These Centers were set to work with 26 communities across the country to either collect vital data on local heat patterns and potential risks or shape local governance to comprehensively address the threat of extreme heat. These communities represented a cross-cut of the United States, from urban to coastal to rural to agricultural to tribal. Both Center’s leadership plans to continue the work with the selected communities in a reduced capacity, and continue to work towards aspirational goals like a universal heat action plan. Future research, coordination, and technical assistance at NOAA on extreme heat is under fire with the proposed total elimination of NOAA Research in the FY26 budget.

At FEMA, a key source of funding for local heat resilience projects, the Building Resilience Infrastructure and Communities (BRIC) program, has been cancelled. BRIC was the only FEMA Resilience grant that explicitly called out extreme heat in its Notice of Funding Opportunity, and funded $13 million in projects to mitigate the impacts of extreme heat. Many states have also faced difficulties in getting paid by FEMA for grants that support their emergency management divisions, and the FY26 budget proposes cuts to these grant programs. The cancellation of Americorps further reduces capacity for disaster response. FEMA is also dropping its support for improving building codes that mitigate disaster risk as well as removing requirements for subnational governments to plan for climate change. 

At HHS, a lack of staff at CDC has stalled payments from key programs to prepare communities for extreme heat, the Building Resilience Against Climate Effects (BRACE) grant program and the Public Health Preparedness and Response program. BRACE is critical federal funding for state and local climate and health offices. In states like North Carolina, the BRACE program funds live-saving efforts like heat-health alerts. Both of these programs are proposed to be totally eliminated in the FY26 budget. The Hospital Preparedness Program (HPP) is also slated for elimination, despite being the sole source of federal funding for health care system readiness. HPP funds coalitions of health systems and public health departments, which have quickly responded to heat disasters like the 2021 Pacific Northwest Heat Domes and established comprehensive plans for future emergencies. The National Institutes of Health’s Climate and Health Initiative was eliminated and multiple grants paused in March 2025. Research on extreme weather and health may proceed, according to new agency guidelines, yet overall cuts to the NIH will impact capacity to fund new studies and new research avenues. The National Institute of Environmental Health Sciences, which funds research on environmental health, faces a 36% reduction in its budget, from $994 million to $646 million.

Access to cool spaces is key to preventing heat-illness and death. Yet cuts, regulatory rollbacks, and program eliminations across the federal government are preventing progress towards ensuring every American can afford their energy bills. At DOE, rollbacks in energy efficiency standards for cooling equipment and the ending of the EnergyStar program will impact the costs of cooling for consumers. Thankfully, DOE’s Home Energy Rebates survived the initial funding freezes and the funding has been deployed to states to support home upgrades like heat pumps, insulation, air sealing, and mechanical ventilation. At HUD, the Green and Resilient Retrofits Program has been paused as of March 2025, which was set to fund important upgrades to affordable housing units that would have decreased the costs of cooling for vulnerable residents. At EPA, widespread pauses and cancellations in Inflation Reduction Act programs have put projects to provide more affordable cooling solutions on pause. At the U.S. Department of Agriculture, all grantees for the Rural Energy for America Program, which funds projects that provide reliable and affordable energy in rural communities, have been asked to resubmit their grants to receive allocated funding. These delays put rural community members at risk of extreme heat this summer, where they face particular risks due to their unique health and sociodemographic vulnerabilities. Finally, while the remaining $400 million in LIHEAP funding was released for this year, it faces elimination in FY26 appropriations. If this money is lost, people will very likely die and utilities will not be able to cover the costs of unpaid bills and delay improvements to the grid infrastructure to increase reliability.

Uncertain progress towards heat policy goals

Momentum towards establishing a federal heat stress rule as quickly as possible has stalled. The regulatory process for the Heat Injury and Illness Prevention in Outdoor and Indoor Work Settings is proceeding, with hearings that began June 16 and are scheduled to continue until July 3. It remains to be seen how the Occupational Safety and Health Administration (OSHA) will proceed with the existing rule as written. OSHA’s National Emphasis Program (NEP) for Heat will continue until April 6, 2026. This program focuses on identifying and addressing heat-related injuries and illnesses in workplaces, and educating employers on how they can reduce these impacts on the job. To date, NEP has conducted nearly 7,000 inspections connected to heat risks, which lead to 60 heat citations and nearly 1,400 “hazard alert” letters being sent to employers.

How Can Subnational Governments Ready for this Upcoming Heat Season?

Downscaled federal capacity comes at a time when many states are facing budget shortfalls compounded by federal funding cuts and rescissions. The American Rescue Plan Act, the COVID-19 stimulus package, has been a crucial source of revenue for many local and state governments that enabled expansion in services, like extreme heat response. That funding must be spent by December 2026, and many subnational governments are facing funding cliffs of millions of dollars that could result in the elimination of these programs. While there is a growing attention to heat, it is still often deprioritized in favor of work on hazards that damage property.

Even in this environment, local and state governments can still make progress on addressing extreme heat’s impacts and saving lives. Subnational governments can:

FAS stands ready to support leaders and communities in implementing smart, evidence-based strategies to build heat readiness – and to help interested parties understand more about the impacts of the Trump administration’s actions on federal heat capabilities. Contact Grace Wickerson (gwickerson@fas.org) with inquiries.

Position On H.Res.446 – Recognizing “National Extreme Heat Awareness Week”

The Federation of American Scientists supports H.Res. 446, which would recognize July 3rd through July 10th as “National Extreme Heat Awareness Week”. 

The resolution is timely, as the majority of heat-related illness and death in the United States occurs from May to September. If enacted, H.Res. 446 would raise awareness about the dangers of extreme heat, enabling individuals and communities to take action to better protect themselves this year and for years to come.

“Extreme heat is one of the leading causes of weather-related mortality and a growing economic risk,” said Grace Wickerson, Senior Manager for Climate and Health at the Federation of American Scientists. “We applaud Rep. Lawler and Rep. Stanton’s efforts to raise awareness of the threat of extreme heat with this resolution and the launch of the new Extreme Heat Caucus.”

Position On H.R.3738 – Heat Management Assistance Grant Act of 2025

The Federation of American Scientists supports H.R. 3738 of the 119th Congress, titled the “Heat Management Assistance Grant Act of 2025.”

The Heat Management Assistance Grant Act of 2025 creates the Heat Management Assistance Grant (HMAG) Program, a quick release of Federal Emergency Management Agency grants to state, local, tribal, and territorial governments for managing heat events that could become major disasters. This resourcing can be used for responses to extreme heat events, including supplies, personnel, and public assistance. HMAG is modeled after the Fire Management Assistance Grant program, which similarly deploys quick funding to activities that prevent wildfires from becoming major disaster events. The bill also creates a definition for an extreme heat event, which informs subnational leaders on when they can ask for assistance.

“Heat emergencies, such as the 2021 Pacific Northwest Heat Dome and 2024 power outage following Hurricane Beryl in Texas, demonstrate a critical need for government assistance for heat-affected communities. Yet to date, there has been no federal pathway for rapidly resourcing heat response,” said Grace Wickerson, Senior Manager for Climate and Health at the Federation of American Scientists. “The Heat Management Assistance Grant Act of 2025 is a critical step in the right direction to unlock the resources needed to save lives, and aligns with key recommendations from our 2025 Heat Policy Agenda.”

Impacts of Extreme Heat on Rural Communities

46 million rural Americans face mounting risks from temperature extremes that threaten workforce productivity, raise business operational costs, and strain critical public services. Though extreme heat is often portrayed in research and the media as an urban issue, almost every state in the contiguous U.S. has rural communities with above-average rates of vulnerability to extreme heat. To protect rural America, Congress must address extreme heat’s impacts by repairing rural health systems, strengthening the preparedness of rural businesses, and hardening rural energy infrastructure.

Extreme heat exacerbates rural communities’ unique health vulnerabilities

On average, Americans living in rural areas are twice as likely as those in urban areas to have pre-existing health conditions, like heart disease, diabetes, and asthma, that make them more sensitive to heat-related illness and death. Further compounding the risk, rural places also have larger populations of underinsured and uninsured people than urban areas, with 1 in 6 people lacking insurance. 

Limited healthcare infrastructure in rural places worsens these vulnerabilities. Rural areas have higher shortages of healthcare professionals who provide primary care, mental health, and dental services than urban areas. Over the last decade, 100 rural hospitals have closed, and hundreds more are vulnerable to closure. Finally, many rural communities do not have public health departments, and those that do are underfunded and understaffed. Because public health systems and healthcare professionals are the first responders to extreme heat, rural residents are severely underprepared. 

Congress should provide flexible resources and technical assistance to rural hospitals to prepare for emerging threats like extreme heat. Additionally, Congress should continue to enable the U.S. Department of Agriculture and the Department of Health and Human Services to provide loans or grant assistance to help rural residents retain access to health services and improve the financial position of rural hospitals and clinics. And because Medicaid expansion correlates with better rural hospital financial performance and fewer closures, Congress should invest in Medicaid to protect rural healthcare access.

Extreme heat puts rural businesses and workers at risk

Rural economic health relies on the outdoors (e.g., recreation tourism) and outdoor labor (e.g., agriculture and oil and gas extraction). Extreme heat in many of these places makes it dangerous to be outside, which impacts worker productivity and local business revenues. Indoor workers in facilities like manufacturing plants, food processing, and warehouses also face heat-related safety threats due to the presence of heat-producing machines and poorly ventilated buildings with limited cooling. These facilities are rapidly growing components of rural economies, as these sectors employ almost 1 in 5 rural workers. 

Simple protections like water, rest, shade, and cooling can improve productivity and generate returns on investments. But small-to-medium rural enterprises need support to adopt affordable cooling systems, shade and passive cooling infrastructure, and worker safety measures that reduce heat-related disruptions. Congress should help rural businesses reduce heat’s risks by appropriating funding to support workplace heat risk reduction and practical training on worker protections. Additionally, Congress should require OSHA to finalize a federal workplace heat standard.

Extreme heat threatens rural energy security

When a power outage happens during a severe extreme heat event, the chance of heat-related illness and death increases exponentially. Extreme heat strains power infrastructure, increasing the risk of power outages. This risk is particularly acute for rural communities, which have limited resources, older infrastructure, and significantly longer waits to restore power after an outage.

Weatherized housing and indoor infrastructure are one of the key protective factors against extreme heat, especially during outages. Yet rural areas often have a higher proportion of older, substandard homes. Manufactured and mobile homes, for example, compose 15% of the rural housing stock and are the one of the most at-risk housing types for extreme heat exposure. When the power is on, rural residents spend 40% more of their income on their energy bills than their urban counterparts. Rural residents in manufactured housing spend an alarming 75% more. Energy debt can force people to choose between paying for life-saving energy or food and key medications, compounding poverty and health outcomes. 

To drive the energy independence and economic resilience of rural America, Congress should support investments in energy-efficient and resilient cooling technologies, weatherized homes, localized energy solutions like microgrids, and grid-enhancing technologies.

Economic Impacts of Extreme Heat: Energy

As temperatures rise, the strain on energy infrastructure escalates, creating vulnerabilities for the efficiency of energy generation, grid transmission, and home cooling, which have significant impacts on businesses, households, and critical services. Without action, energy systems will face growing instability, infrastructure failures will persist, and utility burdens will increase. The combined effects of extreme heat cost our nation over $162 billion in 2024 – equivalent to nearly 1% of the U.S. GDP. 

The federal government needs to prepare energy systems and the built environment through strategic investments in energy infrastructure — across energy generation, transmission, and use. Doing so includes ensuring electric grids are prepared for extreme heat by establishing an interagency HeatSmart Grids Initiative to assess the risk of energy system failures during extreme heat and the necessary emergency responses. Congress should retain and expand home energy rebates, tax credits, and the Weatherization Assistance Program (WAP) to enable deep retrofits that prepare homes against power outages and cut cooling costs, along with extending the National Initiative to Advance Building Codes (NIABC) to accelerate state and local adoption of code language for extreme heat adaptation.  

Challenge & Opportunity: Grid Security

Extreme Heat Reduces Energy Generation and Transmission Efficiency

During a heatwave, the energy grid faces not only surges in demand but also decreased energy production and reduced transmission efficiency. For instance, turbines can become up to 25% less efficient in high temperatures. Other energy sources are also impacted: solar power, for example, produces less electricity as temperatures rise because high heat slows the flow of electrical current. Additionally, transmission lines lose up to 5.8% of their capacity to carry electricity as temperatures increase, resulting in reliability issues such as rolling blackouts. These combined effects slow down the entire energy cycle, making it harder for the grid to meet growing demand and causing power disruptions.

Rising Demand and Grid Load Increase the Threat of Power Outages

Electric grids are under unprecedented strain as record-high temperatures drive up air conditioning use, increasing energy demand in the summer. Power generation and transmission are impeded when demand outpaces supply, causing communities and businesses to experience blackouts. According to data from the North American Electric Reliability Corporation (NERC), between 2024 and 2028, an alarming 300 million people across the United States could face power outages. Texas, California, the Southwest, New England, and much of the Midwest are among the states and regions most at risk of energy emergencies during extreme conditions, according to 2024 NERC data. 

Data center build-out, driven by growing demand for artificial intelligence, cloud services, and big data analytics, further adds stress to the grid. Data centers are estimated to consume 9% of US annual electricity generation by 2030. With up to 40% of data centers’ total yearly energy consumption driven by cooling systems, peak demand during the hottest days of the year puts demand on the U.S. electric grid and increases power outage risk. 

Power outages bear significant economic costs and put human lives at severe risk. To put this into perspective, a concurrent heat wave and blackout event in Phoenix, Arizona, could put 1 million residents at high risk of heat-related illness, with more than 50% of the city’s population requiring medical care. As we saw with 2024’s Hurricane Beryl, more than 2 million Texans lost power during a heatwave, resulting in up to $1.3 billion in damages to the electric infrastructure in the Houston area and significant public health and business impacts.  The nation must make strategic investments to ensure energy reliability and foster the resilience of electric grids to weather hazards like extreme heat. 

Advancing Solutions for Energy Systems and Grid Security

Investments in resilience pay dividends, with every federal dollar spent on resilience returning $6 in societal benefits. For example, the DOE Grid Resilience State and Tribal Formula Grants, established by the Bipartisan Infrastructure Law (BIL), have strengthened grid infrastructure, developed innovative technologies, and improved community resilience against extreme weather. It is essential that funds for this program, as well as other BIL and Inflation Reduction Act initiatives, continue to be disbursed.  

To build heat resilience in communities across this nation, Congress must establish the HeatSmart Grids Initiative as a partnership between DOE, FEMA, HHS, the Federal Energy Regulatory Commission (FERC), NERC, and the Cybersecurity and Infrastructure Security Agency (CISA). This program should (i) perform national audits of energy security and building-stock preparedness for outages, (ii) map energy resilience assets such as long-term energy storage and microgrids, (iii) leverage technologies for minimizing grid loads such as smart grids and virtual power plants, and (iv) coordinate protocols with FEMA’s Community Lifelines and CISA’s Critical Infrastructure for emergency response. This initiative will ensure electric grids are prepared for extreme heat, including the risk of energy system failures during extreme heat and the necessary emergency and public health responses.  

Challenge & Opportunity: Increasing Household and Business Energy Costs

As temperatures rise, so do household and business energy bills to cover cooling costs. This escalation can be particularly challenging for low-income individuals, schools, and small businesses operating on thin margins. For businesses, especially small enterprises, power outages, equipment failures, and interruptions in the supply chain become more frequent and severe due to extreme weather, negatively affecting production and distribution. One in six U.S. households (21.2 million people) find themselves behind on their energy bills, which increases the risk of utility shut-offs. One in five households report reducing or forgoing food and medicine to pay their energy bills. Families, school districts, and business owners need active and passive cooling approaches to meet demands without increasing costs.

Advancing Solutions for Businesses, Households, and Vital Facilities

Affordably cooled homes, businesses, and schools are crucial to sustaining our economy. To prepare the nation’s housing and infrastructure for rising temperatures, the federal government should:

The Federation of American Scientists: Who We Are

At the Federation of American Scientists (FAS), we envision a world where the federal government deploys cutting-edge science, technology, ideas, and talent to solve and address the impacts of extreme heat. We bring expertise in embedding science, data, and technology into government decision-making and a strong network of subject matter experts in extreme heat, both inside and outside of government. Through our 2025 Heat Policy Agenda and broader policy library, FAS is positioned to help ensure that public policy meets the challenges of living with extreme heat.

Consider FAS a resource for… 

We are tackling this crisis with initiative, creativity, experimentation, and innovation, serving as a resource on environmental health policy issues. Feel free to always reach out to us:

Senior Manager, Climate and Health
Grace Wickerson
Medical Innovation,
Emerging Technologies
read more
Senior Associate, Climate, Health, and Environment
Autumn Burton
Environmental Health,
Resilient Communities,
Extreme Weather,
Inclusive Innovation & Technology
read more
Associate Director, Climate and Environment
Hannah Safford
read more

Position On The Heating and Cooling Relief Act of 2025

The Federation of American Scientists supports The Heating and Cooling Relief Act of 2025. With summer right around the corner, it is more important than ever to ensure life-saving home cooling is affordable to all Americans.

The Heating and Cooling Relief Act of 2025 helps mitigate the negative health impacts of extreme heat through necessary modernizations of the Low-Income Home Energy Assistance Program (LIHEAP). The bill includes key provisions of the 2025 Heat Policy Agenda, including ensuring LIHEAP is reauthorized at a level to meet the demand from all eligible households, expanding emergency assistance authorities and funding to cover heating and cooling support during extreme temperature events, preventing energy shutoffs for LIHEAP beneficiaries, increasing the share of funding that can go towards preventative weatherization measures, and requiring the following studies:

“Access to affordable energy is crucial for health security, especially during extreme temperatures. Yet 1 in 6 households can’t afford their energy bills, and the costs of  heating and cooling homes are continuing to climb,” says Grace Wickerson, Senior Manager, Climate and Health. “The Federation of American Scientists is proud to support the Heating and Cooling Relief Act of 2025 bill to bring down the cost of energy for Americans through immediate relief as well as forward-thinking investments in resilience.”

Position On The Cool Roof Product Rebate Act of 2025

The Federation of American Scientists supports the Cool Roof Product Rebate Act of 2025. 

The Cool Roof Product Rebate Act of 2025 would direct the Secretary of Energy to establish a federal rebate program for the purchase and installation of cool roofs. Cool roofs can help households lower energy costs, prevent the negative health impacts of high indoor temperatures, and improve community resiliency by reducing the strain on the grid. This legislation aligns with key recommendations from the FAS 2025 Heat Policy Agenda to enhance the resilience of housing to extreme heat.

“Housing and energy are key determinants of health, and both are becoming increasingly unaffordable to every day Americans” said Grace Wickerson, Senior Manager for Climate and Health at the Federation of American Scientists. “Rebates for cool roofs are smart ways to bring these critical technologies within reach for lower-income households, and allow them to lower their energy bills while bolstering the safety and resilience of their homes.”

Position on S.1166, The Excess Urban Heat Mitigation Act

The Federation of American Scientists supports S.1166, The Excess Urban Heat Mitigation Act.

The Excess Urban Heat Mitigation Act would establish a $30 million dollar grant program at Housing and Urban Development to support efforts to address urban heat via cooling infrastructure, such as green and cool roofs, reflective pavements, shade infrastructure, and tree planting and maintenance, and community resilience actions, such as cooling centers and heat mitigation education. These efforts align with key recommendations from the FAS 2025 Heat Policy Agenda to transform the built and landscaped environment to make it more resilient to the impacts of extreme heat.

“Extreme heat is the leading weather-related cause of injury and death and innovations in the built environment can save money and lives,” said Grace Wickerson, Senior Manager for Climate and Health at the Federation of American Scientists. “With temperatures already nearing 100°F in parts of the country, we must act now to protect our nation’s people, infrastructure, and economy.”  

Position on S.325 – establishing the National Integrated Heat Health Information System

The Federation of American Scientists supports S.325, a bill to establish the National Integrated Heat Health Information System (NIHHIS) and the NIHHIS Interagency Committee.

S.325 would establish a clear, sustained federal governance structure for extreme heat by bringing all responsible agencies together to coordinate planning, preparedness, and response, a key recommendation of FAS’ 2025 Heat Policy Agenda. The bill also authorizes $5 million in annual appropriations for NIHHIS to deliver critical data, forecasts, and warnings and decision-support services as well as support a heat-health research program.

“Senator Markey, Gallego, and Padilla recognize that the National Integrated Heat Health Information System (NIHHIS) is vital to the nation’s extreme heat preparedness and response. We need a comprehensive strategy to build U.S. resilience to extreme heat using science, technology, and evidence-based solutions. Our Nation’s people, infrastructure, and economy depend on it. There is no time to wait – heat season is less than three months away.” said Grace Wickerson, Senior Manager, Climate and Health at the Federation of American Scientists.

Extreme Heat and Wildfire Smoke: Consequences for Communities

More Extreme Weather Leads to More Public Health Emergencies

Extreme heat and wildfire smoke both pose significant and worsening public health threats in the United States. Extreme heat causes the premature deaths of an estimated 10,000 people in the U.S. each year, while more frequent and widespread wildfire smoke exposure has set back decades of progress on air quality in many states. Importantly, these two hazards are related: extreme heat can worsen and prolong wildfire risk, which can increase smoke exposure. 

Extreme heat and wildfire smoke events are independently becoming more frequent and severe, but what is overlooked is that they are often occurring in the same place at the same time. Emerging research suggests that the combined impact of these hazards may be worse than the sum of their individual impacts. These combined impacts have the potential to put additional pressure on already overburdened healthcare systems, public budgets, and vulnerable communities. Failing to account for these combined impacts could leave communities unprepared for these extreme weather events in 2025 and beyond.

To ensure resilience and improve public health outcomes for all, policymakers should consider the intersection of wildfire smoke and extreme heat at all levels of government. Our understanding of how extreme heat and wildfire smoke compound is still nascent, which limits national and local capacity to plan ahead. Researchers and policymakers should invest in understanding how extreme heat and wildfire smoke compound and use this knowledge to design synergistic solutions that enhance infrastructure resilience and ultimately save lives. 

Intersecting Health Impacts of Extremely Hot, Smoky Days

Wildfire smoke and extreme heat can each be deadly. As mentioned, exposure to extreme heat causes the premature deaths of an estimated 10,000 people in the U.S. a year. Long-term exposure to extreme heat can also worsen chronic conditions like kidney disease, diabetes, hypertension, and asthma. Exposure to the primary component of wildfire smoke, known as fine particulate matter (PM2.5), contributes to an additional estimated 16,000 American deaths annually. Wildfire smoke exacerbates and causes various respiratory and cardiovascular effects along with other health issues, such as asthma attacks and heart failure, increasing risk of early death. 

New research suggests that the compounding health impacts of heat and smoke co-exposure could be even worse. For example, a recent analysis found that the co-occurrence of extreme heat and wildfire smoke in California leads to more hospitalizations for cardiopulmonary problems than on heat days or smoke days alone. 

Extreme heat also contributes to the formation of ground-level ozone. Like wildfire smoke, ground-level ozone can cause respiratory problems and exacerbate pre-existing conditions. This has already happened at scale: during the 2020 wildfire season, more than 68% of the western U.S. – about 43 million people – were affected in a single day by both ground-level ozone extremes and fine particulate matter from wildfire smoke.

Impacts on Populations Most Vulnerable to Combined Heat and Smoke

While extreme heat and wildfire smoke can pose health risks to everyone, there are some groups that are more vulnerable either because they are more likely to be exposed, they are more likely to suffer more severe health consequences when they are exposed, or both. Below, we highlight groups that are most vulnerable to extreme heat and smoke and therefore may be vulnerable to the compound impacts of these hazards. More research is needed to understand how the compound impacts will affect the health of these populations.

Housing-Vulnerable and Housing-Insecure People

Access to air conditioning at home and work, tree canopy cover, buildings with efficient wildfire smoke filtration and heat insulation and cooling capacities, and access to  smoke centers are all important protective factors against the effects of extreme heat and/or wildfire smoke. People lacking these types of infrastructure are at higher risk for the health effects of these two hazards as a result of increased exposure. In California, for example, communities with lower incomes and higher population density experience a greater likelihood of negative health impacts from hazards like wildfire smoke and extreme heat. 

Outdoor Workers

Representing about 33% of the national workforce, outdoor workers — farmworkers, firefighters, and construction workers — experience much higher rates of exposure to environmental hazards, including wildfire smoke and extreme heat, than other workers. Farmworkers are particularly vulnerable even among outdoor workers; in fact, they face a 35 times greater risk of heat exposure death than other outdoor workers. Additionally, outdoor workers are often lower-income, making it harder to afford protections and seek necessary medical care. Twenty percent of agricultural worker families live below the national poverty line.

Wildfire smoke exposure is estimated to have caused $125 billion in lost wages annually from 2007 to 2019 and extreme heat exposure is estimated to cause $100 billion in wage losses each year. Without any changes to policies and practice, these numbers are only expected to rise. These income losses may exacerbate inequities in poverty rates and economic mobility, which determine overall health outcomes.

Pregnant Mothers and Infants

Extreme heat and wildfire smoke also pose a significant threat to the health of pregnant mothers and their babies. For instance, preterm birth is more likely during periods of higher temperatures and during wildfire smoke events. This correlation is significantly stronger among people who were simultaneously exposed to extreme heat and wildfire smoke PM2.5.

Preterm birth comes with an array of risks for both the pregnant mothers and baby and is the leading cause of infant mortality. Babies born prematurely are more likely to have a range of serious health complications in addition to long-term developmental challenges. For the parent, having a preterm baby can have significant mental health impacts and financial challenges.

Children

Wildfire smoke and extreme heat both have significant impacts on children’s health, development, and learning. Children are uniquely vulnerable to heat because their bodies do not regulate temperatures as efficiently as adults, making it harder to cool down and putting their bodies under stress. Children are also more vulnerable to air pollution from wildfire smoke as they inhale more air relative to their weight than adults and because their bodies and brains are still developing.  PM2.5 exposure from wildfires has been attributed to neuropsychological effects, such as ADHD, autism, impaired school performance, and decreased memory. 

When schools remain open during extreme weather events like heat and smoke, student learning is impacted. Research has found that each 1℉ increase in temperature leads to 1% decrease in annual academic achievement. However, when schools close due to wildfire smoke or heat events, children lose crucial learning time and families must secure alternative childcare.

Low-income students are more likely to be in schools without adequate air conditioning because their districts have fewer funds available for school improvement projects. This barrier has only been partially remedied in recent years through federal investments.

Older Adults

Older adults are more likely to have multiple chronic conditions, many of which increase vulnerability to extreme heat, wildfire smoke, and their combined effects. Older adults are also more likely to take regular medication, such as beta blockers for heart conditions, which increase predisposition to heat-related illness.

The most medically vulnerable older adults are in long-term care facilities. There is currently a national standard for operating temperatures for long-term care facilities, requiring them to operate at or below 81℉. There is no correlatory standard for wildfire smoke. Preliminary studies have found that long-term care facilities are unprepared for smoke events; in some facilities the indoor air quality is no better than the outdoor air quality.

Challenges and Opportunities for the Healthcare Sector

The impacts of extreme heat and smoke have profound implications for public health and therefore for healthcare systems and costs. Extreme heat alone is expected to lead to $1 billion in U.S. healthcare costs every summer, while wildfire smoke is estimated to cost the healthcare system $16 billion every year from respiratory hospital visits and PM2.5 related deaths. 

Despite these high stakes, healthcare providers and systems are not adequately prepared to address wildfire smoke, extreme heat, and their combined effects. Healthcare preparedness and response is limited by a lack of real-time information about morbidity and mortality expected from individual extreme heat and smoke events. For example, wildfire smoke events are often reported on a one-month delay, making it difficult to anticipate smoke impacts in real time. Further, despite the risks posed by heat and smoke independently and when combined, healthcare providers are largely not receiving education about environmental health and climate change. As a result, physicians also do not routinely screen their patients for health risk and existing protective measures, such as the existence of air conditioning and air filtration in the home. 

Potential solutions to improve preparedness in the healthcare sector include developing more reliable real-time information about the potential impacts of smoke, heat, and both combined; training physicians in screening patients for risk of heat and smoke exposure; and training physicians in how to help patients manage extreme weather risks. 

Challenges and Opportunities for Federal, State, and Local Governments 

State and local governments have a role to play in building facilities that are resilient to extreme heat and wildfire smoke as well as educating people about how to protect themselves. However, funding for extreme heat and wildfire smoke is scarce and difficult for local jurisdictions in need to obtain. While some federal funding is available specifically to support smoke preparedness (e.g., EPA’s Wildfire Smoke Preparedness in Community Buildings Grant Program) and heat preparedness (e.g. NOAA NIHHIS’ Centers of Excellence), experts note that the funding landscape for both hazards is “limited and fragmented.” To date, communities have not been able to secure federal disaster funding for smoke or heat events through the Public Health Emergency Declaration or the Stafford Act. FEMA currently excludes the impacts on human health from economic valuations of losses from a disaster. As a result, many of these impacted communities never see investments from post-disaster hazard mitigation, which could potentially build community resilience to future events. Even if a declaration was made, it would likely be for one “event”, e.g. wildfire smoke or extreme heat, with recovery dollars targeted towards mitigating the impacts of that event. Without careful consideration, rebuilding and resilience investments might be maladaptive for addressing the combined impacts.

Next Steps

The Wildland Fire Mitigation and Management Commission report offers a number of recommendations to improve how the federal government can better support communities in preparing for the impacts of wildfire smoke and acknowledges the need for more research on how heat and wildfire smoke compound. FAS has also developed a whole-government strategy towards extreme heat response, resilience, and preparedness that includes nearly 200 recommendations and notes the need for more data inputs on compounding hazards like wildfire smoke. Policymakers at the federal level should support research at the intersection of these topics and explore opportunities for providing technical assistance and funding that builds resilience to both hazards.

Understanding and planning for the compound impacts of extreme heat and wildfire smoke will improve public health preparedness, mitigate public exposure to extreme heat and wildfire smoke, and minimize economic losses. As the overarching research at this intersection is still emerging, there is a need for more data to inform policy actions that effectively allocate resources and reduce harm to the most vulnerable populations. The federal government must prioritize protection from both extreme heat and wildfire smoke, along with their combined effects, to fulfill its obligation to keep the public safe.

Federation of American Scientists Unveils Federal Policy Agenda for Tackling Extreme Heat; Supported by 60+ Organizations

Announcement Comes as 2024 is Officially Declared Hottest Year on Record; Lingering Effects of Extreme Heat Fuel Catastrophic Wildfires in California

Washington, D.C. – January 13, 2025 – The Federation of American Scientists (FAS), a non-partisan, nonprofit science think tank dedicated to developing  evidence-based policies to address national threats, today released the 2025 Heat Policy Agenda. This strategy provides specific, actionable policy ideas to tackle the growing threat of extreme heat in the United States – an issue that now affects all 50 states and costs the country more than $160 billion annually. The Heat Policy Agenda was co-signed by more than 60 labor, industry, health, housing, environmental, academic and community associations and organizations.

“The 2025 Heat Policy Agenda lays out a comprehensive strategy for how to build U.S. resilience to extreme heat using science, technology, and evidence-based solutions,” says Daniel Correa, CEO of the Federation of American Scientists. “These ideas are also designed to increase government efficiency, protect critical infrastructure, and secure our Nation’s economy. We look forward to helping political leaders pursue rapid implementation of this critical agenda with the ultimate goal of protecting the health and wellbeing of people across the nation.”

Rollout of the Heat Policy Agenda comes as the National Oceanic and Atmospheric Administration (NOAA) confirms 2024 as the hottest year on record, continuing a sustained trend. The 10 warmest years in modern history have all occurred during the past decade. 

Rollout also comes as catastrophic wildfires around Los Angeles provide a stark reminder of the lingering effects of extreme heat, and the interconnected nature of climate effects.

“Prolonged summer heat left vegetation in southern California bone-dry, making it that much easier for wildfires to explode unchecked,” explains Dr. Hannah Safford, FAS Associate Director of Climate and Environment. “Summer heat also depleted water resources critical for firefighting, and made it difficult to safely reduce fuel loads. The crisis we’re seeing around Los Angeles this winter underscores that we have to think about heat year-round – not just when it’s hot outside.”

The Heat Policy Agenda presents clear and specific actions the federal government can take to protect people, places, and the economy from the effects of extreme heat. These include:

“As a Nation, we’ve underinvested in extreme heat relative to other natural hazards – but heat kills more people each year than hurricanes, tornadoes, and floods combined,” observes Grace Wickerson, FAS Health Equity Policy Manager. “Our 2025 Heat Policy Agenda addresses this emerging public health crisis from the ground up, with an emphasis on protecting children, the elderly, and other vulnerable populations.”

The 2025 Heat Policy Agenda represents insights and perspectives from hundreds of practitioners, technical experts, and community leaders. The full list of organizations co-signing the Agenda and urging immediate policy action on extreme heat is listed below. Please fill out this form if your organization would like to be added to this list.

Signatories Urging Policy Action on Extreme Heat

Alliance of Nurses for a Healthy Environment
American Federation of State, County, and Municipal Employees
American Forests
American Lung Association
Arizona State University’s Knowledge Exchange for Resilience
Association of Farmworker Opportunity Programs
Association of State and Territorial Health Officials
Atlantic Council’s Climate Resilience Center
C40 Cities Climate Leadership Group
California ReLeaf
Center for American Progress
Center for Biological Diversity
Center for Energy Poverty and Climate
Center for Invasive Species Prevention
Children’s Environmental Health Network
Climate Mayors
Climate Power
Climate Resolve
Dade County Street Response
Earth Ethics, Inc.
Elevate
Energy Equity Project
Farmworker Association of Florida
Federation of American Scientists
Food Tank
Green Roofs for Healthy Cities
Grid Alternatives
Groundwork USA
ICLEI – Local Governments for Sustainability
Institute for Market Transformation
King County, Washington
Korey Stringer Institute
La Isla Network
League of Conservation Voters
MetroLab Network
Moms Clean Air Force
National Center for Healthy Housing
National Coalition for the Homeless
National Consumer Law Center
National Council on Occupational Safety and Health
National Employment Law Project
National Energy Assistance Directors Association
National Partnership for Women & Families
National Recreation and Parks Association
National Young Farmers Coalition
Natural Resources Defense Council
New America Future of Land and Housing Program
Next100
Organizing Resilience
Physicians for Social Responsibility
Rebuild by Design
SafeWork Washington
Smart Growth America
Smart Home America
Smart Surfaces Coalition
Southeast Sustainability Directors Network
Ten Across Resilience Network
The CLEO Institute
The New Buildings Institute
The Passive House Network
Toxic Free NC
Trust for Public Land
Undaunted K12
Union of Concerned Scientists
Urban Sustainability Directors Network
We Act for Environmental Justice
WeCount!
Women with Broken Heals
Workplace Fairness
Yale Center on Climate Change and Health



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ABOUT FAS

The Federation of American Scientists (FAS) works to advance progress on a broad suite of contemporary issues where science, technology, and innovation policy can deliver dramatic progress, and seeks to ensure that scientific and technical expertise have a seat at the policymaking table. Established in 1945 by scientists in response to the atomic bomb, FAS continues to work on behalf of a safer, more equitable, and more peaceful world. More information about FAS work at fas.org.

ABOUT THIS COALITION

More than 60 labor, health, industry, environmental, and community organizations join with the Federation of American Scientists to support the 2025 Heat Policy Agenda, a comprehensive, common-sense strategy to tackle the growing threat of extreme heat in the United States. This call for action comes as 2024 is officially declared the hottest year on record, continuing a sustained trend. Extreme heat now affects tens of millions of Americans each year, and costs the country more than $160 billion annually in health costs, lost productivity, and other impacts. Rapid implementation of the 2025 Heat Policy Agenda will mitigate heat impacts, boosting the U.S. economy and making it safer for all Americans to live, work, and play.

RESOURCES

Extreme Heat Policy Agenda

2025 Heat Policy Agenda

It’s official: 2024 was the hottest year on record. But Americans don’t need official statements to tell them what they already know: our country is heating up, and we’re deeply unprepared.

Extreme heat has become a national economic crisis: lowering productivity, shrinking business revenue, destroying crops, and pushing power grids to the brink. The impacts of extreme heat cost our Nation an estimated $162 billion in 2024 – equivalent to nearly 1% of the U.S. GDP.

Extreme heat is also taking a human toll. Heat kills more Americans every year than hurricanes, floods, and tornadoes combined. The number of heat-related illnesses is even higher. And even when heat doesn’t kill, it severely compromises quality of life. This past summer saw days when more than 100 million Americans were under a heat advisory. That means that there were days when it was too hot for a third of our country to safely work or play.

We have to do better. And we can.

Attached is a comprehensive 2025 Heat Policy Agenda for the Trump Administration and 119th Congress to better prepare for, manage, and respond to extreme heat. The Agenda represents insights from hundreds of experts and community leaders. If implemented, it will build readiness for the 2025 heat season – while laying the foundation for a more heat-resilient nation.

Core recommendations in the Agenda include the following:

  1. Establish a clear, sustained federal governance structure for extreme heat. This will involve elevating, empowering, and dedicating funds to the National Interagency Heat Health Information System (NIHHIS), establishing a National Heat Executive Council, and designating a National Heat Coordinator in the White House.
  2. Amend the Stafford Act to explicitly define extreme heat as a “major disaster”, and expand the definition of damages to include non-infrastructure impacts.
  3. Direct the Secretary of Health and Human Services (HHS) to consider declaring a Public Health Emergency in the event of exceptional, life-threatening heat waves, and fully fund critical HHS emergency-response programs and resilient healthcare infrastructure.
  4. Direct the Federal Emergency Management Agency (FEMA) to include extreme heat as a core component of national preparedness capabilities and provide guidance on how extreme heat events or compounding hazards could qualify as major disasters.
  5. Finalize a strong rule to prevent heat injury and illness in the workplace, and establish Centers of Excellence to protect troops, transportation workers, farmworkers, and other essential personnel from extreme heat.
  6. Retain and expand home energy rebates, tax credits, LIHEAP, and the Weatherization Assistance Program, to enable deep retrofits that cut the costs of cooling for all Americans and prepare homes and other infrastructure against threats like power outages.
  7. Transform the built and landscaped environment through strategic investments in urban forestry and green infrastructure to cool communities, transportation systems to secure safe movement of people and goods, and power infrastructure to ready for greater load demand.

The way to prevent deaths and losses from extreme heat is to act before heat hits. Our 60+ organizations, representing labor, industry, health, housing, environmental, academic and community associations and organizations, urge President Trump and Congressional leaders to work quickly and decisively throughout the new Administration and 119th Congress to combat the growing heat threat. America is counting on you.

Executive Branch

Federal agencies can do a great deal to combat extreme heat under existing budgets and authorities. By quickly integrating the actions below into an Executive Order or similar directive, the President could meaningfully improve preparedness for the 2025 heat season while laying the foundation for a more heat-resilient nation in the long term. 

Streamline and improve extreme heat management.

More than thirty federal agencies and offices share responsibility for acting on extreme heat. A better structure is needed for the federal government to seamlessly manage and build resilience. To streamline and improve the federal extreme heat response, the President must:

Boost heat preparedness, response, and resilience in every corner of our nation.

Extreme heat has become a national concern, threatening every community in the United States. To boost heat preparedness, response, and resilience nationwide, the President must:

Usher in a new era of heat forecasting, research, and data.

Extreme heat’s impacts are not well-quantified, limiting a systematic national response. To usher in a new era of heat forecasting, research, and data, the President must:

Protect workers and businesses from heat.

Americans become ill and even die due to heat exposure in the workplace, a moral failure that also threatens business productivity. To protect workers and businesses, the President must:

Prepare healthcare systems for heat impacts.

Extreme heat is both a public health emergency and a chronic stress to healthcare systems. Addressing the chronic disease epidemic will be impossible without treating the symptom of extreme heat. To prepare healthcare systems for heat impacts, the President must:

Ensure affordably cooled and heat-resilient housing, schools, and other facilities.

Cool homes, schools, and other facilities are crucial to preventing heat illness and death. To prepare the build environment for rising temperatures, the President must:

Promote Housing and Cooling Access

Prepare Schools and Other Facilities

Legislative Branch

Congress can support the President in combating extreme heat by increasing funds for heat-critical federal programs and by providing new and explicit authorities for federal agencies.

Treat extreme heat like the emergency it is.

Extreme heat has devastating human and societal impacts that are on par with other federally recognized disasters. To treat extreme heat like the emergency it is, Congress must:

Build community heat resilience by readying critical infrastructure.

Investments in resilience pay dividends, with every federal dollar spent on resilience returning $6 in societal benefits. Our nation will benefit from building thriving communities that are prepared for extreme heat threats, adapted to rising temperatures, and capable of withstanding extreme heat disruptions. To build community heat resilience, Congress must:

Leveraging the Farm Bill to build national heat resilience.

Farm, food, forestry, and rural policy are all impacted by extreme heat. To ensure the next Farm Bill is ready for rising temperatures, Congress should:

Funding critical programs and agencies to build a heat-ready nation.

To protect Americans and mitigate the $160+ billion annual impacts of extreme heat, Congress will need to invest in national heat preparedness, response, and resilience. The tables on the following pages highlight heat-critical programs that should be extended, as well as agencies that need more funding to carry out heat-critical work, such as key actions identified in the Executive section of this Heat Policy Agenda.