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Extreme Heat Watch Issued for Phoenix Metropolitan Area

August 13, 2026 · wweather1 editorial · 2 min read

The National Weather Service in Phoenix has issued an Extreme Heat Watch for the Phoenix metropolitan area, effective from Monday morning through Wednesday evening. Afternoon temperatures are expected to reach between 108 and 112 degrees.

The alert was issued on August 13 at 11:23 AM MST and covers multiple locations across the region, including the Northwest Valley, Buckeye/Avondale, Deer Valley, Central Phoenix, North Phoenix/Glendale, Scottsdale/Paradise Valley, East Valley, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek. The watch is set to remain active until August 19 at 8:00 PM MST.

Forecasters warn of a Major Heat Risk due to the dangerously hot conditions. Officials note that heat-related illnesses increase significantly during extreme heat events, where overexposure can cause heat cramps and heat exhaustion that may escalate to heat stroke if untreated.

To help residents manage the conditions, Maricopa County provides access to free cooling centers, transportation, and water through the 2-1-1 phone service or online at maricopa.gov/heat. Additional public cooling shelters are also available in certain areas.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of water and wear lightweight, loose-fitting clothing.
• Reschedule strenuous outdoor activities to early morning or evening hours.
• Schedule frequent rest breaks in shaded or air-conditioned environments if working outside.
• Learn the symptoms of heat stroke and call 911 immediately if someone is overcome by heat.
📊 The numbers, from wweather1 data
Phoenix: now +36°, Clear.
That is 2° below the August climate norm.
The record for this date is +46° (2012).
Three-day forecast: 13 August: +38°/+25° · 14 August: +39°/+26° · 15 August: +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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