FirstAlerts
Severe Weather

Southern California Heat Advisory Extended Through Sunday Evening

The advisory, which takes effect at 10 a.m. Saturday, Aug. 8, now runs until 8 p.m. Sunday, Aug. 9 — later than when it was first issued.

By AI ReporterWritten Aug 8, 2026, 3:27 a.m. ET

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The covering much of Southern California now runs longer than first issued, with an end time of 8 p.m. Sunday, Aug. 9, 2026, according to reporting by the Orange County Register and the Press-Telegram. The begins at 10 a.m. Saturday, Aug. 8. The two outlets differ on which forecast office issued the : the Press-Telegram attributes it to , while the Orange County Register attributes it to . The expected temperatures are also described differently. The Orange County Register reported highs in the low 90s east of Interstate 5 and in the mid-90s in the Santa Ana mountains, while the Press-Telegram reported very warm temperatures of 90 to 100 degrees. Both outlets reported the advisory-level hazard and the stated impact that The listed areas span the Santa Ana Mountains and foothills, Orange County, the Santa Clarita Valley, the Palos Verdes Peninsula, the Los Angeles County inland coast including downtown Los Angeles, the western and eastern Santa Monica Mountains recreational areas, Calabasas/Agoura Hills, the San Fernando and San Gabriel valleys, the Santa Lucia Mountains, the southern Salinas Valley, the Santa Ynez Valley, the Santa Barbara County southwestern coast, the western and eastern ranges of the Santa Ynez Mountains, Lake Casitas, the Ojai Valley, and the central and southeastern Ventura County valleys.

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Revision history

  1. Version 812 Aug 2026, 14:54current

    Corrected the issuing-office attributions (Birmingham for WTUG, NBC Bay Area and lohud.com; Paducah for WFIW Radio) and added WTUG's West Alabama advisory times, forecast, precautions and county list.

  2. Version 712 Aug 2026, 11:08

    Added WESH's reporting of heat index values of 108 to 112 across east central Florida, its 8 p.m. Aug. 12 end time and its "dangerously hot" impact wording, plus east central Florida to the areas listed.

  3. Version 612 Aug 2026, 00:21

    Added WFIW Radio's Aug. 11 southern Illinois reporting — Paducah issuing office, Aug. 13 end time, heat index near 110 and precautions — and updated the issuing-office attributions accordingly.

  4. Version 512 Aug 2026, 00:10

    Added WTOC's Aug. 11 coastal advisory times, 110-degree heat index and hydration advice, plus WESH's report of feels-like temperatures above 108 in Central Florida, and added Central Florida and coastal communities to the areas listed.

  5. Version 411 Aug 2026, 00:18

    Added Clarksville Online (Middle Tennessee), CBS12 (South Florida) and lohud.com (New York) reporting on timing, temperatures, precautions and affected areas.

  6. Version 310 Aug 2026, 00:14

    Added RiverheadLOCAL's Long Island reporting, including its differing start/end times, heat index figure, impacts wording, precautions and Suffolk/Nassau areas.

  7. Version 29 Aug 2026, 03:23

    Added NBC Bay Area reporting: safety precautions, a third temperature range (up to 105 degrees), and the interior Bay Area and Central Coast areas; added Daily News and Daily Breeze attribution.

  8. Version 18 Aug 2026, 06:25current

    First published.

  9. Version 18 Aug 2026, 06:14

    First published.

  10. Version 18 Aug 2026, 05:37current

    First published.

  11. Version 18 Aug 2026, 07:27current

    First published.

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