Overall Green alert Flood for Japan
in Japan

Flood impact summary

Flood Japan is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

GDACS ID: 1101670
Deaths: 1
Displaced: -
Region: Kakegawa, Hamamatsu, Shizuoka Prefecture
Countries: Japan
From - To 23 Sep - 25 Sep
Known identifiers for this event:

GDACS Score

For more info on GDACS alert score click here.

Impact Assessement as of 24-09-2022

SENDAI Indicator A N Country Location Info
death 1 Japan Kakegawa
SENDAI Indicator B N Country Location Info
affected 3 Japan Hamamatsu
SENDAI Indicator C N Country Location Info
houses 36 Japan Shizuoka Prefecture

Satellite Observation

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2022-09-11 / 2022-10-02  

Sunday 11/09Monday 12/09Tuesday 13/09Wednesday 14/09Thursday 15/09Friday 16/09Saturday 17/09Sunday 18/09Monday 19/09Tuesday 20/09Wednesday 21/09Thursday 22/09Friday 23/09Saturday 24/09Sunday 25/09Monday 26/09Tuesday 27/09Wednesday 28/09Thursday 29/09Friday 30/09Saturday 01/10Sunday 02/10

Timeline of revisions

For accessing reports of previous advisories, please click on the advisory number in the table below.

IDAlert ColorPopulation affectedStart DateEnd DateSource
1 1 deaths 18 Sep 2022 20 Sep 2022 GLOFAS
2 1 deaths 23 Sep 2022 25 Sep 2022 GLOFAS

Flood polygons

This polygon (translucent blue with a blue border) is drawn by the analysts recording the flood event. It is meant to include all the areas reported as affected, by official source or the media. It does not represent the area actually under water.

Microwave flood detection

Flooded area, as detected in microwaves by the Global Flood Detection System of the JRC, based on NASA TRMM/GPM observations. This system has a rather low resolution (of 5-10km) but is not affected by clouds.
For more details, see http://www.unisdr.org/files/9622_LBNA23303ENC002.pdf.
The areas with a flood signal along the coast are an artefact of the system and should not be considered.

Optical Flood detection

Flooded area as detected in optical wavelengths by NASA/MODIS, known as "MODIS Flood Product". Data are made available by NASA GSFC Flood Mapping Project, http://oas.gsfc.nasa.gov/floodmap/index.html. Resolution of 250m, heavily affected by cloud cover.