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 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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Photo by Dawn Jones Redstone

Sun-safe

Ten tips from DEOHS for keeping your cool on the job this summer

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Photo by Richard Thornton via shutterstock

Stay heat safe

Hot tips from DEOHS to help outdoor workers stay healthy as temperatures rise

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

The health effects of extreme heat

How our research is contributing to the public health response

LEARN MORE

In the news

Health officials warn painful disease will become a major threat this decade: 'A large amount of human suffering'
November 12, 2025 | The Cool Down | Featured: Marissa Childs View

Want to make America healthy again? Stop fueling climate change
November 12, 2025 | The Conversation | Featured: Howard Frumkin View

Bill Gates calls for climate fight to shift focus from curbing emissions to reducing human suffering
October 28, 2025 | AP | Featured: Kristie L. Ebi View

The world is heading to add 57 superhot days a year, but study indicates it could have been worse
October 16, 2025 | AP | Featured: Kristie L. Ebi View

Study finds workplace injuries increase significantly in the heat
October 8, 2025 | NPR | Featured: June T. Spector View