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Extreme Heat Watch Issued for Phoenix Area Through Monday Evening

July 21, 2026 · wweather1 editorial · 2 min read

An Extreme Heat Watch has been issued by NWS Phoenix AZ for several communities across the Phoenix metropolitan area. Dangerously hot conditions are possible from Thursday morning through Monday evening, with afternoon temperatures potentially reaching 108 to 115 degrees Fahrenheit.

The National Weather Service (NWS) Phoenix AZ has issued an Extreme Heat Watch for multiple areas. These 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.

The watch is in effect from Thursday morning through Monday evening. Afternoon temperatures are projected to range from 108 to 115 degrees Fahrenheit, indicating a Major Heat Risk for the affected regions.

Exposure to these conditions carries the risk of heat cramps and heat exhaustion. Without intervention, these can lead to heat stroke. Heat related illnesses are expected to increase significantly during this period of extreme heat.

For residents in Maricopa County, resources are available by calling 2-1-1. This service can provide information on free cooling centers, transportation, and water.

Why it is dangerous and what to do

⚠️ Safety
• Take extra precautions if working or spending time outdoors.
• Reschedule strenuous activities to early morning or evening when possible.
• Wear lightweight, loose-fitting clothing and drink plenty of water.
• Recognize signs of heat exhaustion and heat stroke; call 911 for heat stroke.
📊 The numbers, from wweather1 data
Phoenix: now +40°, Clear.
The record for this date is +45° (2006).
Three-day forecast: 22 July: +41°/+29° · 23 July: +45°/+30° · 24 July: +46°/+31°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates.

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📰 Data source: NWS. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.

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