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Be Informed

Thermometer with high temperature

Extreme Heat

Heat waves are becoming increasingly common in the U.S. as a direct result of climate change, and California is seeing its fair share of extreme temperatures. Because heat waves are growing in frequency, Californians will need to do more to protect themselves from heat-related illnesses.

Health and age play a significant role in how people react to extreme heat. By knowing how to prepare for a heat wave, and what to do when one occurs, you can avoid the biggest health dangers, such as heat exhaustion and heat stroke.

Extreme Heat & Health

Recommendations and Resources for Local Health Jurisdictions (LHJs) and Local Responders / Service Providers

As climate change is making our summers hotter, California is entering the hottest and longest heat wave this year. It's important to stay informed and protect those most vulnerable from hot temperatures by providing guidance on how to stay cool at home or in place, finding other locations to stay cool, and being able to access resources and services to help stay safe in the heat.

Extreme Heat Guidance 9/8/22

Heat-related illnesses include cramps, heat exhaustion and most seriously, heat stroke and death. Warning signs of heat-related illnesses vary, but may include heavy sweating, muscle cramps, weakness, headache, nausea or vomiting, paleness, tiredness or dizziness.

To learn more about the warning signs and symptoms of heat-related illnesses, visit the CDC's page on heat-related illness.

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