Heat Advisory

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service San Diego CA 152 PM PDT Tue Sep 8 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY... ...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM WEDNESDAY TO 8 PM PDT THURSDAY... * WHAT...For the Extreme Heat Warning, dangerously hot conditions with temperatures high temperatures in the upper 90s to 107 with low temperatures in the 70s expected. For the Heat Advisory, high temperatures in the mid 90s to 102 expected. * WHERE...San Bernardino and Riverside County Valleys-The Inland Empire. * WHEN...For the Extreme Heat Warning, until 8 PM PDT Wednesday. For the Heat Advisory, from 8 PM Wednesday to 8 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Major HeatRisk through Wednesday. Warm overnight temperatures will limit overnight relief from the heat. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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.