The National Weather Service issued an Extreme Heat Warning for the Phoenix metropolitan area effective September 9 at 4:22 a.m. MST through 8 p.m. MST Thursday. Afternoon temperatures are expected to reach 105 to 109 degrees across Northwest Valley, Buckeye/Avondale, Cave Creek/New River, Deer Valley, Central Phoenix, North Phoenix/Glendale, Scottsdale/Paradise Valley, East Valley, Fountain Hills/East Mesa, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek.
The warning carries a Major Heat Risk. Heat-related illnesses increase significantly during extreme heat events, with potential for heat cramps, heat exhaustion, and heat stroke without intervention. Residents should take extra precautions if working or spending time outdoors and reschedule strenuous activities to early morning or evening when possible. In Maricopa County, call 2-1-1 to locate free cooling centers, transportation, water, and additional resources.
Source: National Weather Service.
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- National Weather Service retrieved 09/09/2026 11:24
Authored by The Scottsdale Signal. Drafted by AI from primary-source material under our beat-specific editorial guides; reviewed by humans before publish under our five-gate process. Sources retrieved at 09/09/2026 11:24. Every claim traces to a source.
