What is Extreme Heat?

An extreme heat event is two or more days and nights of unusually high heat for your region. California is experiencing more frequent episodes of extreme heat, creating a greater danger to Californians from heat-related illness.

How to Stay Informed

Check the local news and resources for weather forecasts, extreme heat alerts, and cooling centers.

Find additional resources to help handle the heat.

Assess Your Risk

Extreme heat puts a lot of stress on your body and can be deadly. Find out if you are or a loved one are at a higher risk for heat related illness.

Get Heat Ready

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Make a Plan

As with earthquakes, floods, or other serious natural weather events, planning can help protect yourself and vulnerable family members.

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Move to Cooler Place

Find a cooling center, community center, public library, shopping mall, or other air-conditioned building that can provide relief.

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Know the Warning Signs
of Heat-Related Illness

Symptoms of heat stroke and heat exhaustion can include heavy sweating, muscle cramps, feeling weak, headache, nausea or vomiting, tiredness, or dizziness.

Top 3 Heat Tips


Stay Cool

Avoid being outside in the direct heat for a long time. Try to stay in air-conditioned spaces, at home with your A/C set between 75-80 degrees, or at your local library, shopping mall, or community center. If staying home, keep blinds closed and wear loose, light-colored, lightweight clothing.


Stay Hydrated

Sip water all day and consider supplementing with sports drinks. Avoid caffeine and alcohol.


Look After Each Other

Check in on friends and family and have them do the same for you.

Extreme Heat Planning Resources

California’s state agencies and departments have gathered additional resources and information to help you stay safe, cool and connected.

Stay Informed

Stay Cool and Save Money

Stay Safer in Extreme Heat

Emergency Resources