Photo of Lake Murray on March 17 by Karen Pearlman
East County News Service
March 17, 2026 (San Diego County) -- Baby, it's hot outside!
An unusually powerful high-pressure system has settled over Southern California, ushering in a period of dangerously hot conditions that threaten to shatter both daily and monthly temperature records across San Diego County.
The National Weather Service has issued an extreme heat warning for the desert regions beginning at 10 a.m. Wednesday, March 18, and extending through 8 p.m. Saturday, March 21.
The NWS warns that residents in the low deserts should prepare for blistering highs between 104 and 112 degrees Fahrenheit, with the most intense heat expected on Thursday and Friday. Overnight relief will be minimal, as temperatures are only projected to dip into the mid-70s.
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