Overall Green alert Flood
in Indonesia

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: 1100717
Deaths: 14
Displaced: 1119
Region: Aceh, Central Java, East Java, North Sulawesi, Riau Islands, Kepulauan Sangihe Regency
Countries: Indonesia
From - To 01 Jan - 11 Jan
Known identifiers for this event:


For more info on GDACS alert score click here.

Impact Assessement as of 04-01-2021

SENDAI Indicator A N Country Location Info
death 11 Indonesia Cimanggung
death 2 Indonesia Bima Regency
death 1 Indonesia Kepulauan Sangihe Regency
SENDAI Indicator B N Country Location Info
affected 66400 Indonesia Bandung Regency
affected 731 Indonesia Sidoarjo Regency
affected 1651 Indonesia Demak Regency
affected 150 Indonesia East Aceh Regency
affected 855 Indonesia Lhokseumawe City
affected 10000 Indonesia Langsa City
affected 137 Indonesia Tanjung Pinang City
affected 1493 Indonesia Bintan Regency
displaced 1000 Indonesia Kepulauan Sangihe Regency
displaced 119 Indonesia Bintan Regency
SENDAI Indicator C N Country Location Info
houses damaged 10572 Indonesia Bandung Regency
houses damaged 90 Indonesia Bima Regency
houses damaged 2323 Indonesia Langsa City
houses damaged 200 Indonesia Kepulauan Sangihe 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 11 deaths 08 Jan 2021 11 Jan 2021 FloodList
2 0 deaths 10 Jan 2021 10 Jan 2021 FloodList
3 2 deaths 05 Jan 2021 07 Jan 2021 FloodList
4 0 deaths 01 Jan 2021 06 Jan 2021 FloodList
5 0 deaths 02 Jan 2021 07 Jan 2021 FloodList
6 0 deaths and 119 displaced 02 Jan 2021 06 Jan 2021 FloodList
7 1 deaths and 1000 displaced 04 Jan 2021 06 Jan 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.