The National Weather Service issued an Extreme Heat Warning for the Phoenix metropolitan area on August 18 at 11:47 AM MST. The warning covers Northwest Valley, Buckeye/Avondale, Deer Valley, Central Phoenix, North Phoenix/Glendale, Scottsdale/Paradise Valley, East Valley, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek. Afternoon temperatures are expected to reach 108 to 112 degrees, creating a major heat risk.
The warning remains in effect until 8 PM MST on Friday, August 21. Heat-related illnesses increase significantly during extreme heat events, and overexposure can lead to heat cramps, heat exhaustion, and heat stroke. Residents should take extra precautions if working or spending time outdoors, reschedule strenuous activities to early morning or evening, and drink plenty of water. Maricopa County residents can call 2-1-1 to find free cooling centers, transportation, and water.
Source: National Weather Service.
Sources
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- National Weather Service retrieved 18/08/2026 18:50
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 18/08/2026 18:50. Every claim traces to a source.
