Event Brief
Southern California heat wave timeline: extreme heat
By The BriefBrief · Sources (2)
Filed: Aug 26, 2026 at 11:00 AM ET
Summary: A prolonged heat wave is driving dangerously high temperatures across Southern California, with extreme heat warnings in effect for much of the region through 8 p.m. Friday, according to the National Weather Service. Inland areas, valleys, and mountain ranges are expected to run 10 to 15 degrees above average, reaching up to 112 degrees, alongside an elevated wildfire risk.
WHO: National Weather Service
WHAT: Extreme heat warnings and a heat-wave timeline for Southern California, with temperatures up to 112 degrees and increased wildfire risk.
WHEN: Aug 28, 2026
WHERE: Southern California
WHY: The heat wave is producing dangerously high temperatures that also increase the risk of wildfires.
ℹ️ This event is analyzed using pattern arcs, velocity indicators, and source analysis in our MI Console.
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