National Weather Service United States Department of Commerce
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Last Map Update: Thu, Sep 10, 2026 at 4:02:34 pm PDT

Hot and humid conditions will continue to produce major heatrisk for the coastal basin and low deserts today. Moderate HeatRisk elsewhere (except high elevations of the mountains).
Isolated showers and storms are expected for the mountains this afternoon, mainly near Big Bear Lake. Any storms that develop may produce heavy rainfall and gusty winds.
High temperatures for Thursday. Temperatures remain hot. Cooler weather expected this weekend. Some cooling on Friday will allow for moderate HeatRisk in the coastal basin. Areas of major HeatRisk linger in the low deserts.
A cooling trend will allow temperatures to drop to a few degrees below normal across the region by Sunday.

 

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