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Severe · Extreme Heat WarningActive alert

Extreme Heat Warning issued September 8 at 10:49AM PDT until September 10

Affecting Cuyama Valley; Santa Clarita Valley; San Luis Obispo County Beaches; San Luis Obispo County Inland Central Coast; Santa Lucia Mountains; Southern Salinas Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Santa Barbara County Central Coast Beaches; Santa Barbara County Inland Central Coast; Santa Ynez Valley; Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains; Ventura County Beaches; Ventura County Inland Coast; Lake Casitas; Ojai Valley; Central Ventura County Valleys; Southeastern Ventura County Valleys; Santa Susana Mountains

In effect until: Sep 9, 2026, 10:00 PM

Cuyama Valley; Santa Clarita Valley; San Luis Obispo County Beaches; San Luis Obispo County Inland Central Coast; Santa Lucia Mountains; Southern Salinas Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Santa Barbara County Central Coast Beaches; Santa Barbara County Inland Central Coast; Santa Ynez Valley; Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains; Ventura County Beaches; Ventura County Inland Coast; Lake Casitas; Ojai Valley; Central Ventura County Valleys; Southeastern Ventura County Valleys; Santa Susana Mountains

Likely impact; effects through 10:00 PM.

Stay in air conditioning if possible. Drink water regularly and check on elderly neighbors.

Read the original bulletin (official text)
* WHAT...Temperatures of 88 to 108 expected.

* WHERE...Calabasas and Agoura Hills, Eastern San Fernando Valley,
Eastern 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,
Palos Verdes Hills, Western San Fernando Valley, and Western Santa
Monica Mountains Recreational Area

* WHEN...From 8 AM Wednesday to 8 PM PDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Hot temperatures may cause heat illnesses.

* ADDITIONAL DETAILS...Humid conditions will add to heat discomfort.
Heat peaking on Wednesday for most areas, except likely peaking
Thursday for the Santa Barbara South Coast.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™