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Extreme Heat Warning Issued for Phoenix Metropolitan Area

September 7, 2026 · wweather1 editorial · 2 min read

The National Weather Service in Phoenix has issued an Extreme Heat Warning for the Phoenix metropolitan area from 10:00 AM Tuesday to 8:00 PM MST Thursday. Afternoon temperatures are forecasted to reach between 105 and 109 degrees.

The National Weather Service (NWS) office in Phoenix, Arizona, issued the alert at 12:33 AM MST on September 7. Major heat risk conditions are expected during the warning period, which runs from 10:00 AM Tuesday until 8:00 PM MST Thursday.

The warning covers locations throughout the Phoenix metropolitan area, including Central Phoenix, North Phoenix/Glendale, Deer Valley, Scottsdale/Paradise Valley, Cave Creek/New River, Northwest Valley, Buckeye/Avondale, East Valley, Fountain Hills/East Mesa, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek.

Health officials warn that extreme heat significantly increases the risk of heat-related illnesses. Prolonged exposure can cause heat cramps and heat exhaustion, which can escalate to heat stroke without intervention.

In Maricopa County, residents can call 2-1-1 to find assistance, including free cooling centers, transportation, and water availability.

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 areas if working outdoors.
• Move anyone overcome by heat to a cool, shaded area and call 911 in the event of heat stroke.
📊 The numbers, from wweather1 data
Phoenix: now +31°, Clear.
That is 5° above the September climate norm.
The record for this date is +44° (1979).
Three-day forecast: 7 September: +42°/+29° · 8 September: +43°/+27° · 9 September: +41°/+34°
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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