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2d ago

California Issues Widespread Heat Advisories as Temperatures Soar Above 105°F

Health agencies urge residents to stay hydrated, limit outdoor activity, check on vulnerable neighbors ahead of Friday’s peak heat.

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 from 11 a.m. to 8 p.m. Friday for inland Bay Area counties, the Central Valley and the Central Coast where highs are forecast to reach 105–107 °F.
  • A Spare the Air alert is in effect in the Bay Area as low humidity and dry vegetation elevate fire weather risk through Saturday.
  • Coastal communities including San Francisco and Oakland will remain cooler under a persistent marine layer, with highs largely in the 60s and 70s.
  • Public health officials warn that outdoor workers, older adults, unhoused residents, pets and livestock face heightened danger of heat-related illness without proper hydration or cooling.
  • A Pacific trough is expected to bring a gradual cooldown by Sunday, returning temperatures to near seasonal averages and easing fire concerns by early next week.