Highlights
- NWS Phoenix issued an Extreme Heat Watch covering Scottsdale, Paradise Valley, and the broader Phoenix metro effective Monday through Friday evening.
- Afternoon temperatures may reach 109 to 113 degrees, with overnight lows between 88 and 92.
- Maricopa County residents can call 2-1-1 to locate free cooling centers, transportation, and water.
- Heat stroke is a medical emergency; call 911 for anyone overcome by heat.
The National Weather Service in Phoenix issued an Extreme Heat Watch covering Scottsdale, Paradise Valley, and the broader Phoenix metropolitan area from Monday morning through Friday evening, August 21, warning of dangerously hot conditions that could push afternoon temperatures to 109 to 113 degrees with overnight lows of 88 to 92.
The NWS classifies the event as Major Heat Risk. Heat-related illnesses rise sharply during periods of this intensity, the agency said, with overexposure capable of progressing from heat cramps and heat exhaustion 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, according to the alert.
Anyone overcome by heat should be moved immediately to a cool, shaded location. Heat stroke requires a call to 911.
Maricopa County residents can call 2-1-1 to find a free cooling center, transportation, water, and additional resources. More information is available at maricopa.gov/heat.
The watch remains in effect until Friday, August 21 at 8 p.m. MST.
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 15/08/2026 06:50
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 15/08/2026 06:50. Every claim traces to a source.
