Overall Green alert Flood
in Indonesia

Flood impact summary

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

GDACS ID: 1100751
Deaths: 2
Displaced: 63700
Region: South Sumatra, West Java
Countries: Indonesia
From - To 01 Feb - 09 Feb
Known identifiers for this event:


For more info on GDACS alert score click here.

Impact Assessement as of 04-02-2021

SENDAI Indicator A N Country Location Info
death 2 Indonesia Pasuruan
SENDAI Indicator B N Country Location Info
affected 4035 Indonesia Cilegon
affected 2138 Indonesia Jember Regency
affected 366 Indonesia Surakarta City
affected 150 Indonesia Banyuwangi Regency
affected 11650 Indonesia Pasuruan
affected 3100 Indonesia Nganjuk Regency
affected 589 Indonesia Serang City
affected 3612 Indonesia Serang Regency
affected 10672 Indonesia Kudus Regency
affected 1843 Indonesia Balangan Regency
affected 1785 Indonesia Penukal Abab Lematang Ilir Regency
affected 156800 Indonesia West Java
displaced 63700 Indonesia West Java
SENDAI Indicator C N Country Location Info
houses 357 Indonesia Penukal Abab Lematang Ilir Regency
houses damaged 39100 Indonesia West Java
houses damaged 807 Indonesia Cilegon
houses damaged 620 Indonesia Nganjuk Regency
houses damaged 189 Indonesia Serang City
houses damaged 823 Indonesia Serang Regency
houses damaged 3244 Indonesia Kudus Regency
houses damaged 460 Indonesia Balangan Regency

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 0 deaths 01 Feb 2021 01 Feb 2021 FloodList
2 0 deaths 03 Feb 2021 08 Feb 2021 FloodList
3 0 deaths and 63700 displaced 04 Feb 2021 04 Feb 2021 FloodList
4 2 deaths 01 Feb 2021 09 Feb 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.