The health effects of extreme heat

A construction worker rests on grass with a safety vest over his face.

How our research is contributing to the public health response

In the United States, heat-related mortality is the number one weather-related killer—and these deaths are nearly all preventable. As global warming continues, scientists predict extreme and dangerous heat waves will be much more common.

The UW Department of Environmental & Occupational Health Sciences (DEOHS) is at the leading edge of research into how extreme heat affects people’s health. We particularly focus on those who are most vulnerable to the health risks, including farmworkers, outdoor laborers and the elderly.

Our research is also identifying new ways to help communities adapt to heat through risk communication, evidence-based policies, land-use strategies and other approaches.

Learn more about this research led by our Center for Health and the Global Environment, Collaborative on Extreme Event Resilience and the Pacific Northwest Agricultural Safety and Health Center, all part of DEOHS.

Our impact

3 people wearing face masks stand next to weather monitoring equipment inside a chain-link fence.

Heat, fire, smoke and health in Washington’s ag industry

DEOHS researchers investigate the combined health effects of wildfire smoke and heat on Washington’s agricultural workforce and test strategies to protect workers and crops

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A wilting sunflower surrounded by dried out plants.

A hotter future could be deadly for many

US deaths due to heat exposure may markedly increase in a warming climate, according to research from DEOHS and collaborators

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A group of people kneeling or leaning over green shrubs in the sun.

Heat risk for farmworkers

US agricultural workers will see unsafely hot workdays double by 2050, says new UW, Stanford study

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3 part image showing Italian fields, a man in Kenya with water bottles, and a windswept beach in Dominican Republic

DEOHS faculty win global innovation awards

Funds will support international health studies on heat waves, natural hazards and sustainable food

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A toddler girl stands outside in a park with fallen leaves.

The lifelong health impacts of business as usual

Climate change is already damaging the health of the world’s children and threatens lifelong impact, says DEOHS co-author of Lancet report

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A man stands on a rural hillside picking peppers from plants.

Natural climate solutions

New UW research evaluates conservation strategies to create climate-resilient communities, slow global warming and protect health

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In the news

"Workers are going to die on the job": Agricultural research centers concerned by federal budget cuts
April 7, 2025 | KXLY | Featured: Christopher D. Simpson View

‘We’re on the list of targets’: Climate researchers wait for the ax to fall
March 28, 2025 | Politico | Featured: Kristie L. Ebi View

Study projects millions of European heat deaths as world warms
January 27, 2025 | AP | Featured: Kristie L. Ebi View

Driving away from wildfires can be harrowing. Here’s what to do.
January 14, 2025 | The Washington Post | Featured: Joel D. Kaufman View

PODCAST: Climate Change -- A Health Threat for Humanity
December 17, 2024 | The Princeton Pulse Podcast | Featured: Jeremy J Hess View