Extreme Heat Warning

Locations Affected

Santa Ana, CA ∙ Irvine, CA ∙ San Bernardino, CA ∙ Riverside, CA ∙ Anaheim, CA ∙ Escondido, CA ∙ Garden Grove, CA ∙ Moreno Valley, CA ∙ Ontario, CA ∙ Corona, CA

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service San Diego CA 153 AM PDT Wed Jul 15 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM PDT THURSDAY... * WHAT...Hot and humid conditions with elevated overnight temperatures in the upper 60s and lower 70s. High temperatures in the 90s for inland Orange County and in the mountains below 6000 feet, in the mid 90s to 102 in the San Diego County valleys, and in the upper 90s to 108 for the Inland Empire expected. * WHERE...Orange County Inland Areas, Riverside County Mountains, San Bernardino County Mountains, San Bernardino and Riverside County Valleys-The Inland Empire, San Diego County Mountains, San Diego County Valleys, San Gorgonio Pass near Banning, and Santa Ana Mountains and Foothills. * WHEN...From 10 AM this morning to 8 PM PDT Thursday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. 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.

---