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

September 8, 2026 · wweather1 editorial · 1 min read

The National Weather Service has issued an Extreme Heat Warning for the Coachella Valley, San Diego County Deserts, and San Gorgonio Pass near Banning, in effect from Wednesday morning through Friday evening.

The National Weather Service in San Diego issued the warning on September 8 at 3:44 AM PDT. The extreme heat event is scheduled to begin at 10:00 AM PDT on Wednesday, September 9, and will continue until 8:00 PM PDT on Friday, September 11, 2026.

Dangerously hot conditions are expected, with daytime temperatures forecasted to reach highs of 106 to 110 degrees. Overnight low temperatures are expected to stay in the 80s, limiting overnight relief from the elevated temperatures.

According to the National Weather Service, this event presents areas of Major HeatRisk. The high temperatures are expected to significantly increase the likelihood of heat-related illnesses for individuals in the affected regions.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of fluids.
• 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 +33°, Clear.
That is 7° above the September climate norm.
The record for this date is +44° (2018).
Three-day forecast: 8 September: +43°/+27° · 9 September: +41°/+28° · 10 September: +42°/+33°
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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