The National Weather Service in Phoenix issued a Flash Flood Warning for Maricopa County effective until 12:30 AM MST on August 10. At 9:29 PM MST on August 9, Doppler radar indicated thunderstorms producing heavy rain across the area, with 0.5 to 1.25 inches already fallen. Additional rainfall of 0.5 to 1 inch is possible, and flash flooding is ongoing or expected to begin shortly.
Life-threatening flash flooding is expected to affect creeks, streams, urban areas, highways, streets, and underpasses. Affected locations include Estrella, Sonoran National Monument, Big Horn, Bosque, and Mobile. Interstate 8 between mile markers 125 and 134 and Arizona Route 238 between mile markers 10 and 19 are at risk. Residents should avoid flooded roads and seek higher ground immediately.
Source: National Weather Service.
Sources
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- National Weather Service retrieved 10/08/2026 04:30
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 10/08/2026 04:30. Every claim traces to a source.
