PHOENIX – After recording the hottest August day in city history, Phoenix will remain under an extreme heat warningthrough at least Tuesday evening, according to the National Weather Service.
The advisory, which also covers much of southwestern Arizona, had been set to expire Friday night but was extended due to persistent major heat risk in the coming days. Forecast highs are expected to stay between 110 and 113 degrees, with overnight lows lingering in the upper 80s to around 90 – offering little recovery from the daytime heat.
The extension follows two days of record-breaking temperatures. On Thursday, Phoenix reached 118 degrees at Sky Harbor International Airport, breaking a 120-year-old daily record and setting a new all-time August high. Wednesday hit 116 degrees, surpassing a 30-year-old record for that date.
While conditions will ease slightly, the combination of high temperatures and elevated humidity will continue to pose health risks. City officials urge residents to limit outdoor activity, stay hydrated, wear light, loose-fitting clothing, and take frequent breaks in shaded areas.
During the warning period, certain popular hiking trails will remain closed from 8 a.m. to 5 p.m., including:
Camelback Mountain: Echo Canyon and Cholla trails
Phoenix Mountains Preserve: Piestewa Peak Summit Trail and connected routes
South Mountain Park and Preserve: Holbert, Mormon, Hau’Pal Loop trails, and access to the National Trail from Pima Canyon Trailhead.
