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Climate & Environment

Triple digit highs expected for valleys, triggering excessive heat warnings

A silhouette of buildings in front of a sunset.
Don't put your AC units away just yet
(
Photo by Konstantin Sutyagin via Shutterstock
)

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Quick Facts

  • Today’s weather: Hot, sunny
  • Beaches: 70s
  • Mountains: 90s
  • Inland: 90s-100s
  • Deserts: 100s
  • Warnings and advisories: Excessive heat warning

It may be October, but summer temperatures are back this week.

Expect high heat as temperatures reach the triple digits in the valleys and inland areas today and tomorrow.

A geothermal map of SoCal in shades of orange, red and yellow with white numbers over various cities.
Don't put away your AC unit yet.
(
Courtesy NWS
)
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It will be cooler at the coast, with more dense fog covering coastal areas until 11 a.m. Near the beaches, the daytime highs will reach the 70s, more inland those coastal cities will see highs in the mid 80s, and up to 91 degrees in some areas like downtown L.A. Orange County inland areas will see highs in the upper 80s to low 90s. Coachella Valley will face the brunt of this short heatwave, with a high of 113 degrees.

Some detailed forecasts for you:

  • 99 degrees in Pasadena
  • 91 degrees in Anaheim
  • 107 degrees in the city of Santa Clarita
  • 102 degrees in Fontana

In times of high heat, it's important to stay indoors, hydrated and cool. Make sure you know the difference between heat stroke vs. heat exhaustion.

Tonight's lows will provide some relief — down to the 70s for the warmest valleys, in the 60s closer to the coast. Desert lows will drop to the 80s.

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SoCal Cooling Centers

In L.A., Orange, San Bernardino, and Riverside counties, call 3-1-1 or call for a list of cooling centers. In the city of Los Angeles, you can also find a list of recreation centers, senior centers and libraries — all good choices for cooling off — online.

  • Tip: Call the center in advance to make sure seating is available.
  • Tip: If the center you want is at capacity, or non-operational, head to a local, air-conditioned library and cool off with a book about ice fishing in Antarctica.

You can get more details of cooling centers in Southern California:

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