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

Cecilia Martindale stands smiling on a pier over a bay at low tide, wearing a purple UW hat.

Could heat make us more vulnerable to toxic chemicals?

MS student Cecilia Martindale wins Castner Award to study how heat influences exposure to the world’s most widely used weed killer

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Closeup of Dr. Jeremy Hess in profile holding a microphone with one hand and holding out his other hand.

Protecting health in a changing climate

DEOHS researchers partner with communities to save lives from extreme heat and climate-related disasters

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A temperature contour map of western Washington with dark red in the areas near Puget Sound, orange over the Kitsap Peninsula and lighter orange and yellow over the higher elevation with blue over the Cascade and Olympic mountain ranges.

Climate change intervention: UW faculty lead charge with innovation, research

NIH grant provides $3.8 million to establish REACH Center, using computer model developed by DEOHS faculty

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Cordy stands in front of greenery and smiles at the camera. Cordy wears a black shirt, silver necklace and silver earrings.

Clarifying climate health risks and solutions

UW School of Public Health undergrad interns with Center for Health and the Global Environment 

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Person in a sweatshirt picking apples

Protecting crop workers under the sun and smoke

DEOHS research in agriculture industry aims to increase worker health and safety in heat and wildfire smoke

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Mike Yost stands at a lectern, facing a crowd (not visible). He wears a dark jacket and purple tie. In the background is a tall banner.

Leading with community as a North Star

DEOHS Chair Michael Yost steps down after 10 years 

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In the news

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

Younger people at greater risk of heat-related deaths this century – study
December 6, 2024 | The Guardian | Featured: Kristie L. Ebi View

When is it too hot to use a fan?
November 6, 2024 | Science | Featured: Kristie L. Ebi View