Extreme Heat
Extreme heat can make you sick. Learn how to stay cool and safe.
Beat the Heat
San Mateo County sometimes has very hot days, especially inland and in summer. Heat can make people sick, strain power grids, and increase fire risk. Older adults, children, and people with health problems are most at risk.
10 Ways to Stay Safe in Extreme Heat
- Drink lots of water, even if you’re not thirsty.
- Stay inside during the hottest part of the day.
- Use air conditioning or go to a cooling center.
- Wear light, loose clothes in light colors.
- Never leave kids or pets in a parked car.
- Check on older neighbors and people who live alone.
- Close curtains to keep your home cooler.
- Know the signs of heat illness: dizziness, nausea, confusion. Get help right away.
- Sign up for SMC Alert.
- Prepare for power outages—heat can overload the power grid.
Use These Links to Find Cooling Centers and Heat Safety Information
Explore these resources to help you prepare for and respond to extreme heat. From local cooling options to state and national guidance, these links provide quick access to trusted information.
County Resources
- SMC Alert
- Cooling Centers – San Mateo County Libraries (link only works when cooling centers are open)
- Department of Public Works Emergency Information Line: call 650-363-4100 (24/7)
