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Extreme Heat Watch Issued for Phoenix Metropolitan Area

August 15, 2026 · wweather1 editorial · 2 min read

The National Weather Service in Phoenix has issued an Extreme Heat Watch for the Phoenix metropolitan area from Monday morning through Friday evening. Afternoon temperatures are forecast to reach between 109 and 113 degrees.

The watch was issued on August 14 at 11:50 PM MST and remains in effect from Monday morning, August 17, until Friday, August 21, at 8:00 PM MST. The affected areas include Northwest Valley, Buckeye/Avondale, Deer Valley, Central Phoenix, North Phoenix/Glendale, Scottsdale/Paradise Valley, East Valley, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek.

Forecasted conditions indicate a Major Heat Risk, with afternoon temperatures ranging from 109 to 113 degrees and overnight lows remaining elevated between 88 and 92 degrees. Overexposure to these conditions significantly increases the risk of heat-related illnesses, which can progress from heat cramps and heat exhaustion to heat stroke.

In Maricopa County, resources are available for those needing assistance during the extreme heat event. Residents can call 2-1-1 or visit https://www.maricopa.gov/heat to locate free public cooling centers, transportation, and water.

Why it is dangerous and what to do

⚠️ Safety
• Drink plenty of water and wear lightweight, loose-fitting clothing.
• Reschedule strenuous outdoor activities to the early morning or evening.
• Schedule frequent rest breaks in shaded or air-conditioned areas if working outdoors.
• Monitor for symptoms of heat exhaustion and heat stroke, and call 911 in the event of a heat emergency.
📊 The numbers, from wweather1 data
Phoenix: now +28°, Clear.
That is 2° above the August climate norm.
The record for this date is +46° (2015).
Three-day forecast: 15 August: +42°/+27° · 16 August: +43°/+27° · 17 August: +43°/+35°
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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