The National Weather Service issued a Flood Advisory for Maricopa County at 2:27 AM MST on August 20, effective until 3:45 AM MST. Heavy rain from thunderstorms has caused between 1 and 1.75 inches of rainfall, with minor flooding ongoing or expected to begin shortly in low-lying and poor drainage areas.
Affected locations include Phoenix, Mesa, Chandler, Tempe, Downtown Scottsdale, Downtown Mesa, Arizona State University, and several shopping centers and parks. No additional rainfall is expected, though flooding impacts will continue through the advisory period. Residents should avoid driving on flooded roads; most flood deaths occur in vehicles attempting to cross flooded areas.
Source: National Weather Service.
Sources
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- National Weather Service retrieved 20/08/2026 09:30
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 20/08/2026 09:30. Every claim traces to a source.
