Overall Green Flood in Japan from 13 Aug 2026 01:00 UTC to 15 Aug 2026 01:00 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve awareness, information exchange and coordination in the first phase after major sudden-onset disasters.

Overall Green Flood

in Japan

Event summary

Flood can have a low humanitarian impact based on the magnitude, exposed population and vulnerability.

GDACS ID	FL 1104090
Death:	8
Displaced:	7359
Countries:	Japan
From - To	13 Aug - 15 Aug

GDACS Score

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Virtual OSOCC

Meteo assessment

Satellite products

Analytical products

Chiba Prefecture, Japan, Mid-August 2026Heavy rain caused flooding in areas of Chiba Prefecture in Japan in mid-August 2026.Fri 14 Aug 2026Provided by Copernicus EMS GloFAS

Detailed event map. European Union, 2026. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

Updates on volcanic activity (Smithsonian)

Latest media headlines

Uzbekistan, Japan strengthen cooperation on urban climate resilience 8/15/2026 7:18:00 AM.

BAKU, Azerbaijan, August 15. Uzbekistan and Japan discussed measures to strengthen the resilience of cities across Central Asia to climate change and natural disasters, with a focus on early warning systems, disaster preparedness and risk-b

...(more)

Historic Submarine Restoration Reveals a Hidden Connection to a Lost S.. 8/14/2026 5:21:00 PM.

Restorers working on the USS Silversides discovered a flood valve that appears to have been destined for sister ship USS Trigger USS Silversides Submarine Museum. Restorers working on the World War II submarine USS Silversides have made an

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At least 8 dead, 20,000 homes in darkness: What''s fuelling Japan''s d.. 8/14/2026 11:48:00 AM.

Japan is grappling with an extraordinary spell of rain that has turned parts of Chiba prefecture, east of Tokyo, into a flood zone. at least eight people, according to news agency Reuters, disrupted rail and road links, cut power and left

...(more)

Record-breaking rain in Japan leaves several dead, thousands stranded 8/14/2026 11:03:00 AM.

At least four people were killed, and one remains missing after record-breaking rain triggered flooding in Japan’s Chiba prefecture near Tokyo. More than 400,000 people were ordered to move as flood risks remained high despite easing rainfa

...(more)

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Estimated casualties (PAGER)

USGS estimates the number of casualties for each earthquake for the Prompt Assessment of Global Earthquakes for Response (PAGER) product.
The graph shows the current fatalities estimate.

Exposed population

Analytical products

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: EC-JRC (36), NASA (3), WMO (1), INFORM (2), (1),

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