Highlights
- The National Weather Service issued an Extreme Heat Warning effective May 10 through 8 p.m. Tuesday, May 12.
- Afternoon highs of 104 to 110 degrees are forecast across Scottsdale, Paradise Valley, and the broader Phoenix metro.
- 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; move them to a cool, shaded location immediately.
The National Weather Service in Phoenix issued an Extreme Heat Warning covering Scottsdale, Paradise Valley, and the greater Phoenix metro area from 2:41 p.m. Sunday through 8 p.m. Tuesday, May 12, with afternoon temperatures forecast between 104 and 110 degrees and a Major Heat Risk rating in effect.
The warning covers Northwest Valley, Buckeye/Avondale, Deer Valley, Central Phoenix, North Phoenix/Glendale, East Valley, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek in addition to Scottsdale and Paradise Valley.
The NWS notes that heat-related illnesses increase significantly during extreme heat events, with overexposure capable of progressing from heat cramps and heat exhaustion to heat stroke without intervention. Anyone overcome by heat should be moved to a cool, shaded location immediately; heat stroke requires a call to 911.
For those working or spending time outdoors, the NWS advises rescheduling strenuous activity to early morning or evening, 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.
In Maricopa County, free cooling centers, transportation, and water are available by calling 2-1-1 or visiting maricopa.gov/heat. Public cooling shelters are also available in some areas, county officials can provide locations.
The warning remains in effect until 8 p.m. MST Tuesday.
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 10/05/2026 21:43
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 10/05/2026 21:43. Every claim traces to a source.
