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Extreme Heat Warning Issued for Phoenix Metropolitan Area Through Saturday

August 26, 2026 · wweather1 editorial · 2 min read

The National Weather Service in Phoenix has issued an Extreme Heat Warning for the Phoenix metropolitan area, effective from August 26 until August 29 at 8:00 PM MST. Afternoon temperatures are forecast to reach between 108 and 117 degrees, posing a major to extreme heat risk.

The warning covers a broad section of the region, including the Northwest Valley, Buckeye, Avondale, Deer Valley, Central Phoenix, North Phoenix, Glendale, Scottsdale, Paradise Valley, East Valley, South Mountain, Ahwatukee, and the Southeast Valley, including Queen Creek.

According to the National Weather Service, these dangerously hot conditions will increase the risk of heat-related illnesses. These illnesses include heat cramps, heat exhaustion, and heat stroke, the latter of which is a life-threatening emergency.

To assist residents during this period, Maricopa County offers resources such as free cooling centers, transportation, and water, which can be accessed by calling 2-1-1 or visiting https://www.maricopa.gov/heat. Public cooling shelters are also operating in several areas, with local officials available to provide further details.

For those who must be outdoors, the Occupational Safety and Health Administration advises taking frequent rest breaks in shaded or air-conditioned environments. If someone shows signs of being overcome by heat, they must be moved to a cool, shaded area immediately.

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 hours.
• Take frequent rest breaks in shaded or air-conditioned spaces if working outdoors.
• Know the signs of heat stroke and heat exhaustion, and call 911 immediately in an emergency.
📊 The numbers, from wweather1 data
Phoenix: now +36°, Clear.
That is 8° above the August climate norm.
The record for this date is +45° (2001).
Three-day forecast: 26 August: +48°/+33° · 27 August: +45°/+32° · 28 August: +44°/+32°
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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