The National Weather Service in Phoenix issued a Flash Flood Warning for Maricopa County on September 16 at 12:56 p.m. MST, effective until 5 p.m. MST. Doppler radar indicated thunderstorms producing heavy rain across the area, with 0.5 to 1.5 inches already fallen. Expected rainfall rates are 1 to 2 inches per hour, with additional accumulations of 1 to 2 inches possible.
Life-threatening flash flooding is ongoing or expected to begin shortly in creeks, streams, urban areas, highways, streets, and underpasses. Affected locations include Phoenix, Scottsdale, Fountain Hills, Desert Ridge Marketplace, McDowell Mountain Park, Deer Valley Airport, and Granite Reef Dam. The National Weather Service advises turning around and avoiding flooded roads; most flood deaths occur in vehicles.
Source: National Weather Service.
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- National Weather Service retrieved 16/09/2026 19:58
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 16/09/2026 19:58. Every claim traces to a source.
