Climate Change and Health: Heat

Extreme heat and longer heat waves can cause illness or death. As the climate warms, there are increasingly more dangerous hot days, and even more hot nights. Climate change has resulted in less cooling at night which puts additional heat stress on vulnerable individuals. 

Groups that are most at risk from heat-related risks include the elderly, very young children, outdoor workers, people with chronic diseases, the socially isolated, low income populations, and some communities of color.  Large cities that generate strong urban heat islands can be particularly dangerous.