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

September 9, 2026 · wweather1 editorial · 1 min read

The National Weather Service has issued an Extreme Heat Warning for parts of Southern California, bringing dangerously hot conditions expected to last through Friday evening.

The National Weather Service in San Diego, California, issued an Extreme Heat Warning on September 9 at 2:58 AM PDT, which remains in effect until September 11 at 8:00 PM PDT. The warning period officially began at 10:00 AM on September 9.

Affected areas include the Coachella Valley, San Diego County Deserts, and the San Gorgonio Pass near Banning. The region is experiencing areas of Major HeatRisk.

Forecasters anticipate dangerously hot conditions with high temperatures reaching 110 to 114 degrees. Low temperatures are expected to remain in the 80s, providing very little overnight relief from the heat.

Authorities note that heat-related illnesses increase significantly during extreme heat events. The combination of high daytime temperatures and warm overnight conditions creates prolonged stress on the body.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of fluids.
• Stay in an air-conditioned room.
• Stay out of the sun.
• Check up on relatives and neighbors.
📊 The numbers, from wweather1 data
Palm Springs: now +41°, Clear.
That is 6° above the September climate norm.
The record for this date is +43° (1993).
Three-day forecast: 9 September: +42°/+30° · 10 September: +45°/+32° · 11 September: +41°/+32°
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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