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NWS Issues Extreme Heat Warning for the Phoenix Metropolitan Area

August 16, 2026 · wweather1 editorial · 2 min read

An Extreme Heat Warning has been issued for the Phoenix metropolitan area, bringing dangerously hot conditions with expected afternoon temperatures between 109 and 112 degrees.

The National Weather Service in Phoenix, Arizona, issued the Extreme Heat Warning on August 16 at 11:19 AM MST. The warning remains in effect from Monday at 10:00 AM until Friday at 8:00 PM MST.

A major heat risk is associated with this event, covering areas 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.

Overexposure during extreme heat events significantly increases the risk of heat-related illnesses such as heat cramps, heat exhaustion, and potentially heat stroke without intervention.

In Maricopa County, residents can call 2-1-1 to find free cooling centers, transportation, water, and additional resources. Public cooling shelters are also available in some areas.

Why it is dangerous and what to do

⚠️ Safety
• Take extra precautions if you work or spend time outside, and wear lightweight and loose-fitting clothing.
• Reschedule strenuous activities to the early morning or evening when possible, and drink plenty of water.
• Schedule frequent rest breaks in shaded or air-conditioned environments during outdoor work.
• Know the signs and symptoms of heat exhaustion and heat stroke, and call 911 in the event of an emergency.
📊 The numbers, from wweather1 data
Phoenix: now +43°, Clear.
That is 3° above the August climate norm.
The record for this date is +45° (2020).
Three-day forecast: 16 August: +43°/+32° · 17 August: +45°/+28° · 18 August: +43°/+30°
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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