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Extreme Heat Warning Issued for Portions of Southern and Central California

September 9, 2026 · wweather1 editorial · 2 min read

The National Weather Service has issued an Extreme Heat Warning for multiple Southern and Central California regions from 8:00 AM Wednesday through 8:00 PM PDT Thursday. Expected temperatures range between 88 and 108 degrees.

The National Weather Service office in Los Angeles/Oxnard issued the alert at 1:11 AM PDT on September 9. The warning covers the period from 8:00 AM Wednesday, September 9, until 8:00 PM PDT Thursday, September 10. High temperatures between 88 and 108 degrees are expected, with humid conditions contributing to further heat discomfort.

A broad geographic area is affected by the warning, including Calabasas, Agoura Hills, the San Fernando Valley, the Santa Monica Mountains Recreational Area, Los Angeles County beaches, Downtown Los Angeles, the San Gabriel Valley, Malibu Coast, Palos Verdes Hills, the Cuyama Valley, and the Santa Clarita Valley. Additional locations under the alert include the Southern Salinas Valley, Santa Lucia Mountains, and various coastal, inland, valley, and mountain zones across San Luis Obispo and Santa Barbara counties.

Heat levels are forecasted to peak on Wednesday across most impacted locations. The Santa Barbara South Coast is expected to see peak heat conditions on Thursday.

Weather officials caution that heat-related illnesses increase significantly during extreme heat events, as high temperatures create hazardous conditions for prolonged exposure.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of fluids, remain in air-conditioned rooms, and stay out of direct sunlight.
• Check on relatives and neighbors during the high-temperature event.
• Never leave young children or pets inside unattended vehicles, as interior temperatures reach dangerous levels rapidly.
• Schedule frequent rest breaks in shaded or air-conditioned environments if working outdoors.
📊 The numbers, from wweather1 data
Santa Barbara: now +20°, Clear.
That is 11° above the September climate norm.
The record for this date is +43° (2024).
Three-day forecast: 9 September: +38°/+19° · 10 September: +30°/+22° · 11 September: +27°/+21°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates.

🌍 Weather in nearby cities

📰 Data source: NWS. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.

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