FirstAlerts
Severe WeatherVersion 8

Heat advisories reported across multiple states, with outlets differing on timing and temperatures

Reports from mid-August describe heat advisories in California, New York, the Southeast, Middle Tennessee, southern Illinois and Alabama, with conflicting start and end times, issuing offices and forecast figures.

4 reports on this incident · first at Aug 8, 2026, 1:37 a.m. ET

By AI ReporterUpdated Aug 12, 2026, 10:54 a.m. ET
Hot temperatures expected under a may cause heat illnesses, according to reports published Aug. 7 by the Los Angeles Daily News, the Daily Breeze, the Press-Telegram and the Orange County Register. RiverheadLOCAL, reporting Aug. 9, described the impacts differently, saying hot temperatures combined with high humidity can lead to heat illnesses, that seniors and people with chronic health problems or mental health conditions are at increased risk, and that homes without air conditioning can be much hotter than outdoor temperatures. Clarksville Online, reporting Aug. 10, said the combination can place additional stress on the body and increase the risk of heat exhaustion and heat stroke; WFIW Radio, reporting Aug. 11, said it increases the risk of heat-related illnesses; and WESH put it as "" Sources differ on the timing. The Orange County Register, Press-Telegram, Daily Breeze and Daily News reported the beginning at 10 a.m. Saturday, Aug. 8, and running to 8 p.m. Sunday, Aug. 9; RiverheadLOCAL reported it beginning at 10 a.m. Eastern on Sunday, Aug. 9, and ending at 7 p.m. Eastern that day; CBS12 reported Aug. 10; Clarksville Online reported an beginning at 10 a.m. Central on Tuesday, Aug. 11, and ending at 9 p.m. Central on Thursday, Aug. 13; WTOC reported one beginning at 11 a.m. and ending at 8 p.m. on Tuesday, Aug. 11; and WTUG reported one beginning at 1 p.m. and ending at 9 p.m. on Wednesday, Aug. 12. The Journal News (lohud.com) reported an end time of 7 p.m. Monday, Aug. 10; WESH reported an end time of 8 p.m. Wednesday, Aug. 12; and WFIW Radio reported an end time of 8 p.m. Thursday, Aug. 13. Sources also differ on which Weather Service office issued it: WTUG, NBC Bay Area and lohud.com attributed it to the ; the Press-Telegram, the Daily Breeze and the Daily News to NWS Los Angeles/Oxnard; WFIW Radio to the ; RiverheadLOCAL to the ; and the Orange County Register to NWS San Diego. Outlets described the expected heat differently. The Press-Telegram, the Daily Breeze and the Daily News reported very warm temperatures of 90 to 100 degrees. NBC Bay Area reported highs in the 90s and up to 105 degrees Fahrenheit in some interior parts of the region, with lows in the 60s to 80s. The Orange County Register reported highs in the low 90s east of Interstate 5 and in the mid-90s in the Santa Ana mountains. RiverheadLOCAL reported heat index values expected to reach as high as 100, while lohud.com reported actual temperatures reaching about 87 degrees and heat index values up to 95. CBS12 reported highs in the lower to mid 90s under mostly sunny skies, with a moderate to major heat risk and heat index values reaching up to 106-109 for many locations; Clarksville Online reported heat index values as high as 109; WTOC reported ; WESH reported that surface moisture is driving feels-like temperatures above 108 degrees in Central Florida, and in a separate report gave heat index values hitting 108 to 112 in the afternoon across much of east central Florida; WFIW Radio reported maximum heat index values could reach near 110 degrees, with daily values expected to remain near or above 100 degrees through next weekend; and WTUG reported soaring heat index values through the weekend in West Alabama, with moderate to major heat risk and peak heat forecast between 11 a.m. and 7 p.m. The advised precautions also differ between sources. NBC Bay Area reported that the Weather Service recommended avoiding strenuous outdoor activities, staying hydrated and shifting outdoor labor to evening or morning hours when it will be cooler than midday, and that pet owners should take precautions not to leave animals in vehicles. RiverheadLOCAL reported advice to use air conditioning at home or go to a place that has it, to check on vulnerable friends, family members and neighbors, and that the Occupational Safety and Health Administration recommends frequent rest breaks in shaded or air-conditioned areas for those working outdoors; it added that anyone overcome by heat should be moved to a cool, shaded location and that heat stroke is an emergency — call 911. Clarksville Online reported advice to drink plenty of fluids throughout the day even before becoming thirsty, spend time in an air-conditioned location, stay out of direct sunlight during the hottest portions of the day, wear lightweight, loose-fitting clothing outdoors and schedule strenuous activities for the early morning or evening. WFIW Radio reported that residents are encouraged to drink plenty of fluids, stay in air-conditioned areas when possible, avoid prolonged sun exposure and check on relatives, neighbors and pets. WTUG reported advice to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, check up on relatives and neighbors, never leave young children or pets unattended in vehicles, take extra precautions when working or spending time outside, reschedule strenuous activities to early morning or evening where possible, know the signs and symptoms of heat exhaustion and heat stroke, and wear lightweight, loose-fitting clothing. WTOC's advice was to "" Areas listed across the reports include 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, the central and southeastern Ventura County valleys, the interior Bay Area and the Central Coast; northeast, northwest, southeast and southwest Suffolk, northern and southern Nassau, and the Bronx, Kings, New York, Orange, Putnam, Queens, Richmond, Rockland and Westchester in New York; parts of South Florida, Central Florida and east central Florida; portions of southern Illinois; coastal communities; the Alabama counties of Bibb, Fayette, Greene, Hale, Lamar, Perry, Pickens, Sumter, Tuscaloosa and Walker; and a group of Middle Tennessee counties including Montgomery, Davidson, Williamson, Rutherford, Robertson, Sumner and Wilson, with cities including Nashville, Clarksville, Murfreesboro, Franklin, Columbia and Gallatin.

Earlier reports

  1. Aug 8, 2026, 3:27 a.m. ET

    Southern California Heat Advisory Extended Through Sunday Evening

    The heat advisory 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 advisory begins at 10 a.m. Saturday, Aug. 8.

    The two outlets differ on which forecast office issued the advisory: the Press-Telegram attributes it to NWS Los Angeles/Oxnard CA, while the Orange County Register attributes it to NWS San Diego CA.

    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 hot temperatures may cause heat illnesses.

    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.

  2. Aug 8, 2026, 2:25 a.m. ET

    Heat Advisory Remains in Effect Across Southern California Through Sunday Evening

    The heat alert for a broad stretch of Southern California is still classified as a Heat Advisory — not a warning — according to the National Weather Service product reported by the Orange County Register and the Press-Telegram. The advisory took effect at 10 a.m. on Aug. 8, 2026, and runs until 8 p.m. on Aug. 9, 2026. An advisory is the lower of the two levels; nothing in the available record shows it has been raised to a warning.

    The two outlets attribute the alert to different Weather Service offices: the Press-Telegram reported it was issued by NWS Los Angeles/Oxnard CA, while the Orange County Register reported NWS San Diego CA. Neither account outweighs the other.

    The expected temperatures are also reported differently. The Press-Telegram reported very warm temperatures of 90 to 100 degrees. The Orange County Register reported high temperatures in the low 90s east of Interstate 5 and in the mid-90s in the Santa Ana Mountains.

    Both outlets reported the same listed impact: hot temperatures may cause heat illnesses. The areas covered include 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.

  3. Aug 8, 2026, 1:37 a.m. ETFirst report

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

    A heat advisory 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 advisory details reported by the Orange County Register. The advisory is not yet in effect.

    The advisory 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 advisory's stated impacts.

    This is a developing weather situation, and the advisory's terms may be updated or extended by the issuing office before or after it begins.

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Sources

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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