Triple-digit temperatures on deck as heat wave descends on SoCal, ‘squashing’ the marine layer. Temperatures up to 10 degrees above normal expected across the region on Wednesday and Thursday.

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1. It’s time to break out the fans and frozen treats as a midweek hot spell is heading to Southern California with temperatures up to 10 degrees above normal expected across the region on Wednesday and Thursday.

   The worst of the L.A. County heat is forecast for the San Fernando, Antelope and Santa Clarita valleys, where temperatures are expected to sit in the 90s and potentially push into the triple digits, according to the National Weather Service.

   People living in downtown and East Los Angeles can expect to see highs in the 80s to around 90, while temperatures will remain in the 70s along the coast.

   “Big changes coming tomorrow [Tuesday] and the remainder of the week as high pressure over Arizona expands west into Southern California,” stated the weather service in its Monday night Los Angeles forecast. Weaker onshore winds and sinking air from a strengthening high-pressure system “will squash the marine layer to under 1000 feet by Wednesday and bring significant warming to inland areas and minor warming to coastal areas.”

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