First published 10/11/2026, 3:46:15 PM UTC · Last updated 10/11/2026, 3:46:15 PM UTC

Flash Flood Warning issued October 11 at 8:09AM MST until October 11 at 10:30AM MST by NWS Phoenix AZ

A life-threatening flash flood warning covered La Paz County, Arizona, and Imperial and Riverside counties, California. The source reports flooding ongoing or expected shortly and warns people not to drive on flooded roads.

Illustrative image: The Upper Jurassic Morrison Formation is widely distributed in many western American states. The unit consists of fluvial (river/floodplain) and lacustrine (lake) deposits. Dinosaur bones and dinosaur tracks are moderately common in Morrison Formation sediments. Exceptionally dinosaur-rich localities include Como Bluff in Wyoming, Dinosaur National Monument in Utah, Dinosaur Ridge in Colorado, and the Cleveland-Lloyd Quarry in Utah. Seen here is a partial dinosaur vertebral column in matrix at D — James St. John/Wikimedia Commons, CC BY 2.0

Why it matters

The warning identifies life-threatening flooding risks to roads, urban areas, creeks, and streams in the affected counties.

Location

Categories: severe-weather-and-natural-disasters

Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 8/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 4/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 2/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 5/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Positivity: 1/10How harmful or beneficial the event is, from strongly harmful (1) to strongly positive (10).
Urgency: 9/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Sources

Primary official sourceFlash Flood Warning issued October 11 at 8:09AM MST until October 11 at 10:30AM MST by NWS Phoenix AZ

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