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Extreme Heat Warning Issued for Coachella Valley and San Diego County Deserts

September 11, 2026 · wweather1 editorial · 1 min read

The National Weather Service in San Diego has issued an Extreme Heat Warning for several desert and pass areas, in effect until 8:00 PM PDT today. Dangerously hot conditions are expected, with temperatures reaching up to 110.

The National Weather Service (NWS) San Diego issued the warning at 2:30 AM PDT on September 11. The affected areas include the Coachella Valley, the San Diego County Deserts, and the San Gorgonio Pass near Banning.

Forecasters warn that temperatures during this extreme heat event could rise as high as 110. These conditions present a significant health risk, as the likelihood of heat-related illnesses increases during periods of extreme heat.

The warning is scheduled to remain in effect until 8:00 PM PDT this evening. Residents in the impacted regions are urged to take precautionary measures to stay safe.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of fluids to stay hydrated.
• Stay in an air-conditioned room and stay out of the sun.
• Check up on relatives and neighbors.
📊 The numbers, from wweather1 data
Palm Springs: now +31°, Clear.
That is 7° above the September climate norm.
The record for this date is +43° (1990).
Three-day forecast: 11 September: +43°/+31° · 12 September: +41°/+28° · 13 September: +40°/+30°
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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