Overall Red alert Flood
in Bangladesh, India

Flood impact summary

This flood is expected to have a high humanitarian impact based on the magnitude and the affected population and their vulnerability.

GDACS ID: 1100902
Deaths: 10
Displaced: 4350061
Region: Jharkhand, West Bengal, Odisha, Tamil Nadu, Bhola District
Countries: Bangladesh, India
From - To 24 May - 31 May
Known identifiers for this event:


For more info on GDACS alert score click here.

Impact Assessement as of 28-05-2021

SENDAI Indicator A N Country Location Info
death 2 India Odisha
death 8 India Tamil Nadu
SENDAI Indicator B N Country Location Info
displaced 10773 India Jharkhand
displaced 809830 India West Bengal
displaced 593656 India Odisha
displaced 7476 India Tamil Nadu
displaced 703058 India Odisha
displaced 17165 India Jharkhand
displaced 702986 India Odisha
displaced 1504506 India West Bengal
displaced 611 India Tamil Nadu
SENDAI Indicator C N Country Location Info
houses damaged 4500 Bangladesh Bhola District
houses destroyed 993 India Odisha
houses destroyed 142 India Odisha

Satellite Observation


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 18 deaths and 5854567 displaced 24 May 2021 31 May 2021 FloodList

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.