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California Heat Advisories Warn of 106°F Highs This Weekend

Dry vegetation combined with low humidity heightens fire danger ahead of peak temperatures.

Forecasters predict temperatures will reach new heights Friday.
A front gate and mailbox stand intact in front of the ruins of a home after the passage of the Palisades Fire in Pacific Palisades, California, on Jan. 8, 2025.
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Overview

  • The National Weather Service has issued Heat Advisories for interior Bay Area, Central Coast and San Joaquin Valley from May 30 through May 31.
  • Daytime highs are forecast to reach up to 106°F in inland valleys and foothills, with overnight lows remaining in the 60s.
  • Vulnerable groups such as outdoor workers, older adults and unhoused residents face heightened risk of heat-related illnesses and local ERs are preparing for a surge in cases.
  • Low humidity dipping into the teens combined with parched vegetation elevates fire concerns from Friday through Saturday.
  • The heat wave is expected to peak Friday before moderating Sunday, and the National Interagency Fire Center warns of elevated wildfire chances statewide through August.