First published Oct 17, 2026, 10:03:16 AM UTC · Last updated Oct 17, 2026, 10:03:16 AM UTC

Flash Flood Warning issued October 17 at 7:28PM ChST until October 18 at 3:30AM ChST by NWS Tiyan GU

A flash flood warning for Guam reports heavy rain and ongoing or imminent flooding through 3:30 AM ChST. The source advises avoiding flooded roads.

Why it matters

The warning describes active flash-flood danger across Guam and urges caution around flooded roads.

Categories: severe-weather-and-natural-disasters

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: 3/10How 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: 4/10The 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).