First published Oct 21, 2026, 9:43:15 AM UTC · Last updated Oct 21, 2026, 3:01:16 PM UTC

Floods

JMA Heavy rain warning and Flood warning for Japan

Reported by JMA Weather and Disaster Warnings, JMA Weather and Disaster Warnings, JMA Weather and Disaster Warnings, JMA Weather and Disaster Warnings, JMA Weather and Disaster Warnings, JMA Weather and Disaster Warnings

JMA Flood warning for Japan. Additional details were not included in the source data received by Planet Briefing.

At a glance

Affected location: Koyoshi River

Illustrative image: A map of the Sarugaishi River in Tono and Hanamaki, Iwate Prefecture Japan and its tributary, the Hayase River — Iwatebud/Wikimedia Commons, CC BY-SA 3.0

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Why it matters

Additional impact information was not included in the source data received by Planet Briefing.

Update history

Oct 21, 2026, 2:35 PM UTC
JMA Flood warning for Japan. Additional details were not included in the source data received by Planet Briefing.
JMA Weather and Disaster Warnings
Oct 21, 2026, 12:15 PM UTC
JMA Flood warning for Japan. Additional details were not included in the source data received by Planet Briefing.
JMA Weather and Disaster Warnings
Oct 21, 2026, 11:43 AM UTC
JMA Flood warning for Japan. Additional details were not included in the source data received by Planet Briefing.
JMA Weather and Disaster Warnings
Oct 21, 2026, 11:15 AM UTC
JMA Heavy rain warning and Flood warning for Japan. Additional details were not included in the source data received by Planet Briefing.
JMA Weather and Disaster Warnings
Oct 21, 2026, 10:45 AM UTC
JMA Heavy rain warning and Flood warning for Japan. Additional details were not included in the source data received by Planet Briefing.
JMA Weather and Disaster Warnings

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: 3/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 3/10The 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).
Urgency: 8/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Primary official sources

JMA Weather and Disaster Warnings JMA Heavy rain warning and Flood warning for JapanJapan Meteorological Agency (JMA) Usage terms
JMA Weather and Disaster Warnings JMA Heavy rain warning and Flood warning for JapanJapan Meteorological Agency (JMA) Usage terms
JMA Weather and Disaster Warnings JMA Heavy rain warning and Flood warning for JapanJapan Meteorological Agency (JMA) Usage terms
JMA Weather and Disaster Warnings JMA Flood warning for JapanJapan Meteorological Agency (JMA) Usage terms
JMA Weather and Disaster Warnings JMA Flood warning for JapanJapan Meteorological Agency (JMA) Usage terms
JMA Weather and Disaster Warnings JMA Flood warning for JapanJapan Meteorological Agency (JMA) Usage terms

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