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Extreme Heat Warning Issued for Much of Los Angeles and Orange Counties

The National Weather Service warning runs from 8 a.m. Wednesday, September 9, 2026, with the expiration reported differently by two outlets.

2 reports on this incident · first at Sep 8, 2026, 1:58 p.m. ET

By AI ReporterFirst reported Sep 9, 2026, 4:34 p.m. ETUpdated Sep 10, 2026, 9:32 p.m. ET
The has issued an for much of Los Angeles and Orange counties and portions of the Los Angeles County coast and inland valleys, according to the agency's record. The begins at 8 a.m. on Wednesday, September 9, 2026, the record shows. Mynewsla.com reports it expires at 8 p.m. on Thursday, September 10, while kpbs.org reports it expires at 8 p.m. on Wednesday, September 9. A Heat Advisory remains in effect until 8 a.m. Wednesday, September 9, the same record shows. The covers zones, including Calabasas and Agoura Hills, the Eastern and Western San Fernando Valley, the Eastern and Western Santa Monica Mountains Recreational Area, Los Angeles County Beaches, Los Angeles County Inland Coast including Downtown Los Angeles, Los Angeles County San Gabriel Valley, Malibu Coast and Palos Verdes Hills. Cities listed in the affected area include Long Beach, Downtown Los Angeles, Santa Ana, Anaheim, Burbank, Arcadia, Glendora, LAX, Manhattan Beach, Dana Point and Malibu, according to mynewsla.com. The record was issued at 10:49 a.m. on September 8, 2026. Mynewsla.com reports the hazard as , while kpbs.org reports an . Mynewsla.com reports temperatures as high as 108 degrees and elevated humidity from the remnants of Hurricane Marie creating "oppressive" conditions, while kpbs.org reports . Mynewsla.com also reports overnight low temperatures in the 70s to lower 80s offering little respite. Los Angeles County health officials urged residents to stay hydrated, avoid outdoor activity during the hottest hours of the day and check on people at greater risk of heat-related illness, including older adults, young children, outdoor workers and people with chronic medical conditions, according to mynewsla.com. Kpbs.org reported advice to drink plenty of fluids, take cold showers, cover the head with a white wet towel, and watch for signs of heat exhaustion such as paleness, dizziness, headaches, tiredness and weakness.

Earlier reports

  1. Sep 8, 2026, 1:58 p.m. ETFirst report

    Heat Advisory and Extreme Heat Warning Issued for Los Angeles County

    The National Weather Service Los Angeles has issued a Heat Advisory and an Extreme Heat Warning for parts of Los Angeles County, effective from 8 a.m. PDT Wednesday, September 9, 2026, through 8 p.m. PDT Thursday, September 10, 2026. The advisory was issued at 10:49 a.m. PDT Tuesday, September 8, 2026.

    The Heat Advisory is in effect until 8 a.m. PDT Wednesday, and the Extreme Heat Warning runs from 8 a.m. Wednesday to 8 p.m. PDT Thursday. Temperatures between 92 and 108 degrees are expected. The affected areas include the Malibu Coast, Los Angeles County Beaches, Palos Verdes Hills, Los Angeles County Inland Coast including Downtown Los Angeles, Western and Eastern Santa Monica Mountains Recreational Areas, Calabasas and Agoura Hills, Western and Eastern San Fernando Valley, and Los Angeles County San Gabriel Valley.

    The warning covers 34 zones. Officials advise drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking on relatives and neighbors. They also warn not to leave young children and pets in unattended vehicles, as car interiors can reach lethal temperatures in minutes. Heat-related illnesses increase significantly during extreme heat events.

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Sources

Revision history

  1. Version 211 Sept 2026, 01:32current

    Rewrote to attribute the warning record to the National Weather Service, present the conflicting expiration times as a sourced range, and remove the unsupported claim that the agency raised its alert level.

  2. Version 18 Sept 2026, 17:58current

    First published.

  3. Version 111 Sept 2026, 01:29

    First published.

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