The county's official list of "Cool Zones" for 2018 include community centers, recreational centers, libraries, senior centers and museums.
The National Weather Service has issued several advisories this week including an excessive heat warning for some areas east of downtown San Diego.
Triple-digit heat is expected to arrive this weekend in parts of Imperial and Riverside counties, including Joshua Tree National Park.
Higher than average surf and strong rip currents are making for dangerous swimming at San Diego and Orange County beaches.
The National Tsunami Warning Center said there is no tsunami threat.
Forecasters say Southern California will rapidly switch to summerlike conditions on the heels of a chilly system that dusted mountains with snow.
San Diego saw unseasonably cold temperatures throughout the county Monday, and some neighborhoods were doused by light showers. The trend is expected to continue through Wednesday.
A high wind warning was issued Wednesday with winds expected to increase overnight through early Friday.
A high wind warning was in effect Monday for the mountains east of San Diego.
Surfers in Pacific Beach could be seen catching waves despite strong winds blowing them around when trying to get into the water.
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