Highlights
- The National Weather Service issued an Extreme Heat Warning covering Scottsdale and Paradise Valley effective 10 a.m. Sunday through 8 p.m. Tuesday.
- Afternoon temperatures of 105 to 109 degrees are expected, 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; anyone overcome by heat should be moved to shade and 911 called immediately.
EXTREME HEAT WARNING: The National Weather Service in Phoenix has issued an Extreme Heat Warning covering Scottsdale, Paradise Valley, and the broader Phoenix metro from 10 a.m. Sunday, May 10, through 8 p.m. MST Tuesday, May 12.
Afternoon temperatures of 105 to 109 degrees are expected across the affected areas, which include the Northwest Valley, Buckeye/Avondale, Deer Valley, Central Phoenix, North Phoenix/Glendale, the East Valley, South Mountain/Ahwatukee, and the Southeast Valley/Queen Creek corridor. The NWS classifies the event as a Major Heat Risk.
Heat-related illnesses increase significantly during conditions like these, the NWS said. Overexposure can cause heat cramps and heat exhaustion and, without intervention, can progress to heat stroke. Anyone overcome by heat should be moved to a cool, shaded location immediately. Heat stroke is a medical emergency; call 911.
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 anyone working outside.
In Maricopa County, free cooling centers, transportation, and water are available by calling 2-1-1. Additional resources are listed at maricopa.gov/heat.
The warning remains in effect until 8 p.m. MST Tuesday, May 12.
Around the web
Public discussion (links to original posts):
- Reddit · r/phoenix, u/clif_hanger (210 upvotes · 13 comments)
Sources
Every factual claim in this article traces to one of the sources below. See how we work for the editorial process.
- api.weather.gov retrieved 09/05/2026 21:30
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 09/05/2026 21:30. Every claim traces to a source.
