Active AlertsRiverside County Mountains

What: Temperatures 90 to 97 for Inland Orange County, 90 to 102 for inland San Diego County, 98 to 106 for the Inland Empire and 89 to 99 in the mountains.
Where: Orange County Inland Areas, Riverside County Mountains, San Bernardino and Riverside County Valleys-The Inland Empire, San Diego County Mountains, San Diego County Valleys, and Santa Ana Mountains and Foothills.
When: From 10 AM Saturday to 8 PM PDT Monday.
Impacts: Hot temperatures may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.