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Severe Weather

Heat advisory to take effect Saturday morning for Santa Ana Mountains and Orange County

The National Weather Service's San Diego office says high temperatures in the low to mid-90s are expected across parts of Orange County from 10 a.m. Saturday through Sunday evening.

By AI ReporterWritten Aug 8, 2026, 1:37 a.m. ET

More on this incident

A for the Santa Ana Mountains and foothills and Orange County is scheduled to begin at 10 a.m. Saturday, Aug. 8, 2026, and to remain in force until 8 p.m. Sunday, Aug. 9, according to details reported by the Orange County Register. The is not yet in effect. The was issued by the National Weather Service office in San Diego and carries an advisory-level alert. It describes high temperatures in the low 90s east of Interstate 5 and in the mid-90s in the Santa Ana mountains. Hot temperatures may cause heat illnesses, according to the 's stated impacts. This is a developing weather situation, and the 's terms may be updated or extended by the issuing office before or after it begins.

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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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