Heat Illness


In the mostly un-air-conditioned Pacific Northwest, summer temperature spikes can be uncomfortable. But for outdoor workers and other vulnerable groups, they can be deadly. 

Research led by the UW Department of Environmental & Occupational Health Sciences (DEOHS) has found that on hotter days:

Stay heat safe

What’s the difference between heat exhaustion and heat stroke?

What’s the "half-half" rule for staying hydrated?

Which two common medical conditions put you at greater risk for heat illness?

With our Pacific Northwest summer now in full sizzle, people who work outdoors should take extra precautions to keep themselves safe in the heat.

On the front lines of climate change

Miriam Calkins

PhD, Environmental and Occupational Hygiene


Harvard, Massachusetts

Future plans

Associate Service Fellow, National Institute for Occupational Safety and Health

“Trade workers have higher (environmental) exposures than the general public because they are working in industries with concentrated chemicals or a longer duration of heat exposure. These workers often have less agency to change their environment.”

- Miriam Calkins