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Extreme Heat Warning Extended for Orange County Inland Areas Through Wednesday Evening

The National Weather Service has extended the Extreme Heat Warning for Orange County inland areas, now in effect until 8 PM PDT Wednesday, with a Heat Advisory to follow.

4 reports on this incident · first at Sep 8, 2026, 6:17 a.m. ET

By AI ReporterWritten Sep 8, 2026, 6:53 a.m. ET
The National Weather Service (NWS) in San Diego has extended the Extreme Heat Warning for Orange County Inland Areas, now in effect until 8 PM PDT Wednesday, September 10. The warning, issued at 3:10 AM PDT Tuesday, September 8, was originally set to expire earlier but now runs longer, according to the NWS . The warning covers Anaheim, Mission Viejo, Santa Ana, Irvine, Fullerton, Orange, and Garden Grove, with dangerously hot conditions and temperatures up to 97 degrees Fahrenheit. A will follow from 8 PM Wednesday to 8 PM PDT Thursday, with temperatures up to 92 degrees. The NWS advises residents to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check on relatives and neighbors, as heat-related illnesses increase significantly during extreme heat events.

Earlier reports

  1. Sep 8, 2026, 6:23 a.m. ET

    Extreme Heat Warning in Effect for Orange County Inland Areas Until 8 PM PDT Wednesday

    An Extreme Heat Warning is in effect for Orange County Inland Areas until 8 PM PDT Wednesday, September 10, 2026. The warning, issued by the National Weather Service San Diego CA at 3:10 AM PDT Tuesday, September 8, indicates dangerously hot conditions with temperatures up to 97 degrees.

    A Heat Advisory will follow the warning, from 8 PM Wednesday to 8 PM PDT Thursday, with temperatures up to 92 expected. The advisory covers the cities of Anaheim, Mission Viejo, Santa Ana, Irvine, Fullerton, Orange, and Garden Grove.

    Officials warn that heat-related illnesses increase significantly during extreme heat events. Residents are advised to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check on relatives and neighbors.

  2. Sep 8, 2026, 6:21 a.m. ET

    Heat-Related Illness Risk Rises as NWS Warns of Extreme Heat in Orange County

    The National Weather Service San Diego CA warns that heat-related illnesses increase significantly during extreme heat events, as an Extreme Heat Warning and Heat Advisory remain in effect for Orange County Inland Areas.

    The Extreme Heat Warning, issued September 8, 2026, at 3:10 AM PDT, is in effect until 8 PM PDT Wednesday, September 10, 2026, with dangerously hot conditions and temperatures up to 97 degrees. A Heat Advisory follows from 8 PM Wednesday to 8 PM PDT Thursday, with temperatures up to 92 degrees.

    The warning covers Anaheim, Mission Viejo, Santa Ana, Irvine, Fullerton, Orange, and Garden Grove. The Weather Service advises drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking on relatives and neighbors.

  3. Sep 8, 2026, 6:17 a.m. ETFirst report

    Heat Advisory Issued for Orange County Inland Areas

    The National Weather Service in San Diego has issued a Heat Advisory for Orange County Inland Areas, effective from 8 PM PDT Wednesday, September 9, 2026, until 8 PM PDT Thursday, September 10, 2026. The advisory covers Anaheim, Mission Viejo, Santa Ana, Irvine, Fullerton, Orange, and Garden Grove.

    Temperatures are expected to reach up to 92 degrees. The advisory warns that heat-related illnesses increase significantly during extreme heat events. Residents are advised to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check on relatives and neighbors.

    The advisory was issued at 3:10 AM PDT on September 8, 2026.

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Revision history

  1. Version 18 Sept 2026, 10:53current

    First published.

  2. Version 18 Sept 2026, 10:21current

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  3. Version 18 Sept 2026, 10:17current

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  4. Version 18 Sept 2026, 10:23current

    First published.

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