Department of Emergency Management and Security
What It Is
Extreme heat - especially coupled with high humidity - can be deadly, slowing evaporation and thus requiring the body to work harder to moderate its core temperature. Overexposure to hear and/or overexertion (too much exercise or effort) can trigger a heat-related illness: heat cramps, heat exhaustion, and eventually heat stroke. Heat-related illness is a particularly high risk for children, older adults, and those who are infirm or overweight.