Highlights
- An Extreme Heat Warning covers Scottsdale and Paradise Valley from 10 a.m. Tuesday through 8 p.m. Thursday, Sept. 10.
- Afternoon highs of 105 to 109 degrees are expected, with the NWS classifying 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; the NWS instructs anyone overcome by heat to call 911 immediately.
EXTREME HEAT WARNING: The National Weather Service in Phoenix issued an Extreme Heat Warning at 12:33 a.m. Monday covering Scottsdale, Paradise Valley, and the broader Phoenix metropolitan area, effective 10 a.m. Tuesday, Sept. 9 through 8 p.m. Thursday, Sept. 10.
Afternoon temperatures of 105 to 109 degrees are expected across the affected zones, which include the Northwest Valley, Buckeye/Avondale, Cave Creek/New River, Deer Valley, Central Phoenix, North Phoenix/Glendale, the East Valley, Fountain Hills/East Mesa, South Mountain/Ahwatukee, and the Southeast Valley/Queen Creek corridor. The NWS has classified the event as a Major Heat Risk.
The agency warns that 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.
In Maricopa County, free cooling centers, transportation, and water are available by calling 2-1-1 or visiting maricopa.gov/heat. Heat stroke is a medical emergency; call 911.
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 07/09/2026 07:36
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 07/09/2026 07:36. Every claim traces to a source.
