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LA and OC Heat Wave Brings Risk of Thunderstorms, Fires, Health Issues

Temperatures between 95 and 110 degrees pose a high risk of heat illness, especially for vulnerable groups, with emergency alerts active across Southern California.

  • The National Weather Service Los Angeles/Oxnard, CA issued an extreme heat warning for most of Los Angeles County until Saturday Aug. 23 at 9 p.m., with temperatures from 95 to 110 degrees.
  • Meteorologists pointed to a high-pressure system that keeps conditions very hot and dry, with the National Weather Service saying the peak occurred Thursday and Friday.
  • Temperature reports show Woodland Hills, Los Angeles County hit 109 degrees, San Bernardino County peaked at 107, Apple Valley reached 105, and Yorba Linda, Orange County recorded 102 on Thursday.
  • State and city officials pre-deployed firefighting resources including 10 fire engines, while Los Angeles County opened hundreds of cooling centers as the National Weather Service warned of high heat illness risk for vulnerable populations.
  • The outlook shows alerts lasting through Saturday night, and the National Weather Service said extreme heat, elevated fire danger, and thunderstorms with dry lightning threaten the region before relief arrives next week.
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OC Register broke the news in Orange County, United States on Thursday, August 21, 2025.
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