Overall Green alert Flood
in Brazil

Flood impact summary

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

GDACS ID: 1101822
Deaths: 3
Displaced: 300
Region: Rio Negrinho, Rodeio, Bom Jesus, Ituporanga
Countries: Brazil
From - To 17 Jan - 19 Jan
Known identifiers for this event:


For more info on GDACS alert score click here.

Impact Assessement as of 21-01-2023

SENDAI Indicator A N Country Location Info
death 3 Brazil Rodeio
SENDAI Indicator B N Country Location Info
displaced 80 Brazil Rio Negrinho
displaced 190 Brazil Rodeio
displaced 9 Brazil Bom Jesus
displaced 21 Brazil Ituporanga
SENDAI Indicator C N Country Location Info
houses damaged 60 Brazil Rio Negrinho

Satellite Observation

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2023-01-10 / 2023-02-26  

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 3 deaths and 300 displaced 17 Jan 2023 19 Jan 2023 GLOFAS
2 0 deaths 25 Jan 2023 27 Jan 2023 GLOFAS
3 0 deaths and 18 displaced 23 Jan 2023 25 Jan 2023 GLOFAS
4 0 deaths and 4476 displaced 22 Jan 2023 24 Jan 2023 GLOFAS
5 0 deaths 30 Jan 2023 31 Jan 2023 GLOFAS
6 0 deaths and 6 displaced 17 Jan 2023 19 Jan 2023 GLOFAS
7 0 deaths 07 Feb 2023 08 Feb 2023 GLOFAS
8 1 deaths 06 Feb 2023 08 Feb 2023 GLOFAS
9 1 deaths 07 Feb 2023 10 Feb 2023 GLOFAS
10 0 deaths and 100 displaced 17 Feb 2023 19 Feb 2023 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.