Near-record heat will spread across Southern California Thursday through the weekend, with highs from the mid-90s to 105 degrees beyond coastal areas and up to 110 degrees in interior valleys and deserts. Overnight lows will remain above 70 in many urban areas, offering little nighttime relief and increasing health risks. Red flag warnings are in place for mountains and foothills as the heat creates conditions for extreme and rapid fire growth. Monsoonal thunderstorms beginning Friday could produce localized flooding, debris flows, destructive winds and lightning, compounding fire and public-safety hazards.
Extreme heat will build across the Southwest on Wednesday and is expected to bring near-record temperatures to Southern California through the weekend, creating major fire and health concerns. Those threats will be compounded by the possibility of monsoonal thunderstorms that could bring localized flooding, debris flows, destructive winds and lightning beginning Friday. "The dangerous conditions are going to be coming Thursday and sticking around through the first part of the weekend," Cohen said.
The weather service has issued widespread extreme heat warnings as well as red flag warnings for the mountains and foothills. Temperatures across the Southland are forecast to peak Thursday and Friday, with highs reaching from 95 to 105 degrees everywhere beyond the beaches, and up to 110 degrees in Los Angeles County's interior valleys and deserts. "Overnight lows will be above 70 in many areas, including downtown L.A.," Cohen said. "That's going to provide little relief from the heat. ... We're talking about significant impacts for anyone susceptible to the heat. Heat-related illnesses are expect
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