Dangerous Heat Wave to Bring Temperatures Up to 112°F Across Southern California This Week

The National Weather Service issued a heat advisory across Los Angeles and Ventura counties on Sunday, warning inland areas could reach 112°F by Friday.

Original report
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Industry impact

Sustained extreme heat across Southern California raises operational strain for regional airports and ground handling, with elevated wildfire risk adding potential airspace and visibility concerns.

A heat advisory took effect at 10 a.m. Sunday across large portions of Los Angeles and Ventura counties, where the National Weather Service said temperatures could reach 107°F. The advisory runs through 10 a.m. Tuesday, when an extreme heat watch takes over through Friday evening, with the hottest inland areas potentially reaching 112°F.

Forecasters projected Sunday highs of about 96°F in downtown Los Angeles, 106°F in the San Fernando Valley and Inland Empire, 97°F in Orange County and 104°F in the High Desert, with some valleys seeing overnight lows stay in the 70s. The heat is being driven by a strengthening ridge of high pressure, and forecasters said projected highs have continued trending upward as the week approaches.

Air quality concerns were reported Sunday morning in Azusa, Rancho Cucamonga and Redlands, while coastal conditions remained relatively better, and monsoonal moisture could bring isolated showers and thunderstorms to the mountains and deserts through the week. Cooling centers are expected to open regionwide, and officials urged residents to limit outdoor exposure, stay hydrated and check on vulnerable neighbors, while the prolonged heat also raises wildfire danger as vegetation dries out.