What: Dangerously hot conditions with high temperatures of 114 to 118 expected.
Where: Coachella Valley and San Diego County Deserts.
When: From 10 AM Wednesday 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.