NWS Issues Extreme Heat Warning for Scottsdale, Paradise Valley Through Monday Evening

Highlights

• An Extreme Heat Warning is in effect for Scottsdale and Paradise Valley from 10 a.m. Sunday to 8 p.m. Monday.
• Afternoon highs of 104 to 110 degrees are forecast, with the NWS classifying the event as Major Heat Risk.
• Maricopa County residents can call 2-1-1 to locate free cooling centers, transportation, and water.
• Heat stroke is a medical emergency; call 911 if someone is overcome by heat.

The National Weather Service in Phoenix issued an Extreme Heat Warning for Scottsdale and Paradise Valley, along with most of the broader Phoenix metro, effective 10 a.m. Sunday, May 11, through 8 p.m. Monday, May 11, covering afternoon temperatures forecast between 104 and 110 degrees. The NWS classifies the event as a Major Heat Risk. The warning covers the Northwest Valley, Buckeye/Avondale, Deer Valley, Central Phoenix, North Phoenix/Glendale, the East Valley, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek in addition to Scottsdale and Paradise Valley. According to the alert, heat-related illnesses increase significantly during extreme heat events, with overexposure capable of causing heat cramps and heat exhaustion that can progress to heat stroke without intervention. The NWS advises rescheduling strenuous outdoor activity to early morning or evening when possible, wearing lightweight and loose-fitting clothing, and drinking plenty of water. The Occupational Safety and Health Administration recommends frequent rest breaks in shaded or air-conditioned environments for outdoor workers, the alert notes. Anyone overcome by heat should be moved to a cool, shaded location immediately. Heat stroke requires a call to 911. Maricopa County residents can call 2-1-1 or visit maricopa.gov/heat to find a free cooling center, transportation, water, and additional resources. The warning remains in effect until 8 p.m. Monday.

Sources

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1. api.weather.gov retrieved 2026-05-08T17:18:31.206617+00:00

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 2026-05-08T17:18:31.206617+00:00. Every claim traces to a source.