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Extreme Heat Warning Issued for San Diego County Coastal Areas

October 5, 2026 · wweather1 editorial · 1 min read

The National Weather Service has issued an Extreme Heat Warning for San Diego County coastal areas, effective until Thursday evening. High temperatures are forecasted to reach the upper 90s in some locations.

The National Weather Service in San Diego issued the alert at 9:10 PM PDT on October 4. The warning applies to coastal areas across San Diego County and is scheduled to remain in effect until 8:00 PM PDT on October 8.

Temperatures at the beaches are expected to range from the mid 80s to mid 90s, while mesa areas will experience temperatures between the mid 90s and upper 90s. Overnight low temperatures will remain elevated in the 70s.

Officials warn that extreme heat conditions significantly elevate the risk of heat-related illnesses.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of fluids and stay out of direct sunlight.
• Remain in air-conditioned spaces whenever possible.
• Check on relatives and neighbors.
• Never leave young children or pets inside unattended vehicles.
📊 The numbers, from wweather1 data
San Diego: now +22°, Clear.
That is 1° below the October climate norm.
The record for this date is +33° (1950).
Three-day forecast: 13 October: +22°/+16° · 14 October: +27°/+13° · 15 October: +31°/+17°
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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