[Note: I am reposting this information because we are experiencing a very hot period in the USA and across the planet. See the NY Times listing of temperatures predicted for various cities in the USA]
The National Collaborating Centre on Environmental Health in Canada prepared this very helpful document on health checks during extreme heat events. Download and keep it with you and your family or coworkers if you are in extreme heat events. Also, see this related post explaining wet bulb science.
UPDATED May 15, 2023
Washington Post article: What Extreme Heat Does to the Human Body
Susan Feathers 