Highlights
- The National Weather Service has issued an Extreme Heat Warning for Scottsdale and Paradise Valley through 8 p.m. Tuesday, May 12.
- Afternoon highs of 104 to 110 degrees are forecast, with NWS describing conditions 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; move them to a cool, shaded location immediately.
EXTREME HEAT WARNING: The National Weather Service in Phoenix has issued an Extreme Heat Warning for Scottsdale and Paradise Valley, along with the broader Phoenix metro, running from 10 a.m. Monday, May 12, through 8 p.m. MST Tuesday, May 12, according to the NWS alert.
Afternoon temperatures of 104 to 110 degrees are expected across the warning area, which covers the Northwest Valley, Buckeye/Avondale, Deer Valley, Central Phoenix, North Phoenix/Glendale, Scottsdale/Paradise Valley, the East Valley, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek. The NWS classifies current conditions as a Major Heat Risk.
The agency warns that heat-related illnesses rise significantly during events of this severity. 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 requires a call to 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. OSHA recommends frequent rest breaks in shaded or air-conditioned environments for outdoor workers.
Maricopa County residents can call 2-1-1 to find a free cooling center, transportation, water, and related services. Additional county resources are available at maricopa.gov/heat.
The NWS Phoenix forecast office notes that temperatures this week are on track to reach their highest levels of 2026 so far, with lower-desert highs forecast to hit 104 to 112 degrees Monday.
The warning expires at 8 p.m. MST Tuesday, May 12.
Around the web
Minimal public engagement on the heat warning; one Reddit post with modest traction focuses on an unrelated local event.
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 07:28
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 07:28. Every claim traces to a source.
