Active AlertsSanta Ana Mountains and Foothills

What: Dangerously hot conditions with high temperatures in the mid 90s to 104 expected. Night will be very warm with low temperatures mostly in the mid 60s to mid 70s.
Where: Santa Ana Mountains and Foothills.
When: From 10 AM Friday to 8 PM PDT Thursday.
Impacts: Heat related illnesses increase significantly during extreme heat events.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.