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NWS Issues Extreme Heat Warning for Phoenix Area

June 23, 2026 · wweather1 editorial · 2 min read

The National Weather Service (NWS) Phoenix AZ has issued an Extreme Heat Warning for the entire Phoenix metropolitan area. This warning is in effect from 10 AM MST Wednesday, June 24, until 8 PM MST Thursday, June 25, with dangerously hot conditions and afternoon temperatures expected to reach up to 114 degrees.

The Extreme Heat Warning was issued by NWS Phoenix AZ on June 23 at 12:17 PM MST. It covers the entire Phoenix metropolitan area, including Northwest Valley, Buckeye/Avondale, Deer Valley, Central Phoenix, North Phoenix/Glendale, Scottsdale/Paradise Valley, East Valley, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek. Dangerously hot conditions are expected, with afternoon temperatures reaching up to 114 degrees. The warning indicates a local major Heat Risk.

The dangerously hot conditions will be in effect from 10 AM MST Wednesday, June 24, until 8 PM MST Thursday, June 25. An Extreme Heat Warning signifies that a period of very hot temperatures, even by local standards, will occur.

Heat related illnesses increase significantly during extreme heat events. Overexposure to these conditions can cause heat cramps and heat exhaustion to develop. Without intervention, these conditions can lead to heat stroke.

In Maricopa County, residents can call 2-1-1 to find a free cooling center, transportation, water, and other resources. Additional information is available at http://www.maricopa.gov/heat.

Why it is dangerous and what to do

⚠️ Safety
• Take extra precautions if working or spending time outside.
• Reschedule strenuous activities to early morning or evening.
• Drink plenty of water and wear lightweight, loose-fitting clothing.
• Know the signs and symptoms of heat exhaustion and heat stroke.
📊 The numbers, from wweather1 data
Phoenix: now +39°, Clear.
That is 4° above the June climate norm.
The record for this date is +47° (1994).
Three-day forecast: 24 June: +44°/+34° · 25 June: +43°/+31° · 26 June: +42°/+32°
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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