Highlights
- NWS Phoenix issued an Extreme Heat Watch covering Scottsdale and Paradise Valley effective Monday morning through Wednesday at 8 p.m.
- Afternoon highs of 108 to 112 degrees are forecast, with the NWS rating the event as Major Heat Risk.
- Maricopa County residents can call 2-1-1 to locate free cooling centers, water, and transportation.
- 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 Watch covering Scottsdale, Paradise Valley, and the broader Phoenix metropolitan area, with dangerously hot conditions possible from Monday morning through Wednesday evening, August 19, at 8 p.m.
Afternoon temperatures of 108 to 112 degrees are forecast across the watch area, which spans 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 Major Heat Risk and Severe severity.
Heat-related illnesses rise sharply during events of this intensity, the NWS said. Overexposure can progress from heat cramps and heat exhaustion to heat stroke without intervention. Anyone overcome by heat should be moved immediately to a cool, shaded location. 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. 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.
What does an Extreme Heat Watch mean?
An Extreme Heat Watch means a period of very hot temperatures, even by local standards, may occur. It is a step below a Warning but signals that conditions are likely enough to warrant taking action now to reduce exposure and prepare.
The watch remains in effect until August 13 at 3:30 p.m., at which point NWS Phoenix is expected to upgrade, extend, or cancel the alert based on updated forecast modeling.
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 13/08/2026 06:35
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 13/08/2026 06:35. Every claim traces to a source.
