Home California Temperatures to Reach Over 100 Degrees in Contra Costa County

Temperatures to Reach Over 100 Degrees in Contra Costa County

by ECT

The National Weather Service said Saturday that today will be the hottest day of the week with many inland areas exceeding 100 degrees. Both a heat advisory and warnings are in effect. ‘

The heat has also caused a California Flex Alert to be issued for the second day.

The advisory is in effect from 12:00 pm Friday, July 9 through 11:00 pm Sunday as temperatures are anticipated to be 102-degrees to 110-degrees inland. Overnight, temperatures will cool to the 70’s inland, if not, 80’s in the hills, ridges and peaks.

Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.

The City of Antioch has already announced its cooling centers will be open beginning Thursday. Both the Antioch Community Center and the Antioch Senior Center. Both facilities will be open as Cooling Centers beginning Thursday – Sunday, July 8-11 from 12PM – 5PM

The City of Brentwood announced its cooling center will also be open beginning Thursday. The cooling center will be open beginning Thursday, July 8th through Sunday, July 11th, from 1:00 PM-7:00 PM at the Brentwood Community Center 35 Oak Street. Masks and social distancing will be required while inside the community center.

Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location.

Heat stroke is an emergency! Call 9 1 1.


  • Drink plenty of fluids
  • Stay in air conditioned rooms
  • Stay out of the sun
  • Check up on relatives and neighbors
  • don’t leave kids or pets in unattended vehicles

County Employment & Human Services Locations

See EHSD Places to Cool (PDF) and Places to Cool in Spanish (PDF). EHSD offices are open Wednesday, June 16, through Friday, June 18, from 8 AM to 5 PM:

Antioch 4545 Delta Fair Blvd.
Hercules 151 Linus Pauling
Martinez 40 Douglas Drive
Pleasant Hill 400 Ellinwood Way
Richmond 1305 Macdonald

Contra Costa County Libraries

See 20 library locations available as cooling centers. Visit ccclib.org for addresses and hours of operation, or call 1-800-984-4636 for assistance.

Antioch, Prewett in Antioch, Bay Point, Brentwood, Clayton, Concord, Crockett, Danville, El Sobrante, Hercules, Lafayette, Martinez, Moraga, Oakley, Orinda, Pittsburg, San Pablo, Dougherty Station in San Ramon, San Ramon, and Walnut Creek.

Additional Cooling Locations in Contra Costa County

Antioch Senior Center, 415 W. 2nd Street, Antioch
Antioch Community Center, 4703 Lone Tree Way, Antioch

Brentwood Community Center, 35 Oak Street, Brentwood (925) 516-5444
Open Wednesday to Friday, June 16-18, 12 pm to 7 pm

Concord Senior Center, 2727 Parkside Circle, Concord (925) 671-3320

Martinez Senior Center, 818 Green Street, Martinez (925) 370-8770

Oakley Recreation Center St, 1250 O’Hara Ave, Oakley, (925) 625-7041
Open Wednesday to Friday, June 16-18, from 9 am to 4 pm

Pittsburg Senior Center, 300 Presidio Lane (925) 252-4890
Open Thursday, June 17, from 11 AM to 6 PM. Call to check hours.


Via Contra Costa County Health

  • Looking for an air-conditioned, public place to get out of the heat? In Contra Costa County, try 211.
  • Call 911 If you or someone you are observing has a health emergency.

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Street-Sweeper Jul 10, 2021 - 8:18 am

Still hoodie weather in Antioch 🙂 . LOFL

Dawn Jul 10, 2021 - 3:36 pm

Good way to come down with a heat stroke!


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