Highlights
- NWS Phoenix issued a Flash Flood Warning for Maricopa County effective 10:53 p.m. August 9 through 2 a.m. August 10.
- Between 0.5 and 1.5 inches of rain have fallen; flash flooding is ongoing or expected to begin shortly.
- US Highway 60 between mile markers 96 and 99 and 100 and 103 is among the affected corridors.
- Authorities warn most flood deaths occur in vehicles — drivers should not attempt to cross flooded roads.
FLASH FLOOD WARNING: The National Weather Service in Phoenix issued a flash flood warning for Maricopa County in south central Arizona at 10:53 p.m. MST Monday, August 9, valid until 2 a.m. MST Tuesday, August 10.
Doppler radar and automated rain gauges detected thunderstorms dropping between 0.5 and 1.5 inches of rain across the warned area. The NWS describes the hazard as life-threatening flash flooding of creeks, streams, urban areas, highways, streets, and underpasses.
Affected roadways include US Highway 60 between mile markers 100 and 103 and between mile markers 96 and 99. Flooding is also expected along Flying E Wash, Jimmie Wash, Grass Wash, Star Wash, Mill Wash, Daggs Wash, Red Cloud Wash, Hartman Wash, Cemetery Wash, Jackrabbit Wash, Powerline Wash, Woodchopper Wash, Dead Horse Wash, Sols Wash, and the Hassayampa River. The NWS notes impacts are concentrated mainly in rural areas of Maricopa County.
The NWS advises drivers to turn around and not attempt to cross flooded roads, noting that most flood deaths occur in vehicles. Extra caution is urged after dark, when flood dangers are harder to recognize.
The Maricopa County Flood Control District's flooded roadway map provides real-time road condition updates. The warning expires at 2 a.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 10/08/2026 05:55
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 05:55. Every claim traces to a source.
