Extreme heat is characterized by temperatures and humidity higher than average for a specific timeframe, typically two to three days. Extreme heat varies according to geographical location and season. For instance, temperatures and humidity above 95 degrees Fahrenheit during summer in Washington, D.C., qualify as extreme heat, whereas the threshold for extreme heat in Florida during summertime is above 105 degrees Fahrenheit.

Sign up below to learn more about extreme heat and how it impacts human health, as well as download the shareable resources that include: 

• Heat and Health resource 
• Digital bulletin (slides)
• Info sheet that details extreme heat and the warning signs