Overall Red alert Flood for India
in India

Flood impact summary

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

GDACS ID: 1100977
Deaths: 12
Displaced: 85000
Region: Bihar
Countries: India
From - To 05 Aug - 07 Aug
Known identifiers for this event: FL-2021-000093-IND

GDACS Score

For more info on GDACS alert score click here.

Impact Assessement as of 17-08-2021

SENDAI Indicator A N Country Location Info
death 12 India Bihar
SENDAI Indicator B N Country Location Info
affected 252000 India Bihar
affected 2700000 India Bihar
displaced 85000 India Bihar

Satellite Observation

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2021-07-17 / 2021-10-08  

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 25 deaths 17 Jul 2021 19 Jul 2021 GLOFAS
2 6 deaths 11 Jul 2021 14 Jul 2021 GLOFAS
3 0 deaths and 400 displaced 22 Jul 2021 26 Jul 2021 GLOFAS
4 9 deaths and 31360 displaced 22 Jul 2021 24 Jul 2021 GLOFAS
5 204 deaths and 375178 displaced 22 Jul 2021 24 Jul 2021 GLOFAS
6 7 deaths 28 Jul 2021 02 Aug 2021 GLOFAS
7 14 deaths and 250000 displaced 29 Jul 2021 31 Jul 2021 GLOFAS
8 2 deaths 29 Jul 2021 31 Jul 2021 GLOFAS
9 16 deaths 25 Jul 2021 30 Jul 2021 GLOFAS
10 27 deaths and 29280 displaced 01 Aug 2021 03 Aug 2021 GLOFAS
11 0 deaths 07 Aug 2021 09 Aug 2021 GLOFAS
12 7 deaths 03 Aug 2021 05 Aug 2021 GLOFAS
13 12 deaths and 85000 displaced 05 Aug 2021 07 Aug 2021 GLOFAS
14 0 deaths and 6237 displaced 06 Aug 2021 08 Aug 2021 GLOFAS
15 0 deaths and 5000 displaced 04 Aug 2021 06 Aug 2021 GLOFAS
16 0 deaths and 770 displaced 16 Aug 2021 18 Aug 2021 GLOFAS
17 1 deaths GLOFAS
18 1 deaths 30 Aug 2021 01 Sep 2021 GLOFAS
19 5 deaths 29 Aug 2021 31 Aug 2021 GLOFAS
20 5 deaths 06 Sep 2021 08 Sep 2021 GLOFAS
21 10 deaths and 1300 displaced 14 Sep 2021 16 Sep 2021 GLOFAS
22 52 deaths and 1200 displaced 15 Sep 2021 17 Sep 2021 GLOFAS
23 0 deaths GLOFAS
24 1 deaths and 72995 displaced 26 Sep 2021 28 Sep 2021 GLOFAS
25 11 deaths and 500000 displaced 30 Sep 2021 02 Oct 2021 GLOFAS
26 0 deaths 30 Sep 2021 01 Oct 2021 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.