First published 10/10/2026, 1:25:15 AM UTC · Last updated 10/10/2026, 1:25:15 AM UTC

Flood Watch issued October 10 at 10:50AM ChST until October 11 at 6:00AM ChST by NWS Tiyan GU

A flood watch is in effect for Guam through late tonight, with flash flooding already ongoing across southern Guam. Additional heavy rainfall could cause further flash flooding.

Illustrative image: The Salmon River is located in Idaho in the northwestern United States. The Salmon is also known as "The River of No Return". It flows for 425 miles (685 km) through central Idaho, draining a rugged, thinly populated watershed of 14,000 square miles (36,000 km2) and dropping more than 7,000 feet (2,100 m) between its headwaters, near Galena Summit above the Sawtooth Valley in the Sawtooth National Recreation Area, and its confluence with the Snake River. Measured at White Bird, its average disch — Ken Lund/Wikimedia Commons, CC BY-SA 2.0

Why it matters

People in Guam are advised to monitor forecasts and use caution when traveling because flooded roads and additional flash flooding are possible.

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: 6/10How 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: 3/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Positivity: 2/10How harmful or beneficial the event is, from strongly harmful (1) to strongly positive (10).
Urgency: 5/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Sources

Primary official sourceFlood Watch issued October 10 at 10:50AM ChST until October 11 at 6:00AM ChST by NWS Tiyan GU

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