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: 1100534
Deaths: 33
Displaced: 16562
Region: Aceh, Gorontalo, Subulussalam, South Aceh Regency, Aceh Jaya Regency, East Aceh Regency
Countries: Indonesia
From - To 04 Jul - 29 Jul
Known identifiers for this event:


For more info on GDACS alert score click here.

Impact Assessement as of 25-07-2020

SENDAI Indicator A N Country Location Info
death 30 Indonesia South Sulawesi
death 3 Indonesia West Papua
missing 15 Indonesia South Sulawesi
SENDAI Indicator B N Country Location Info
affected 2814 Indonesia Lamandau
affected 5112 Indonesia Tanah Laut Regency
affected 2690 Indonesia Sanggau
affected 2690 Indonesia South Sulawesi
affected 2938 Indonesia Wajo
affected 1190 Indonesia Kepulauan Sula Regency
affected 15994 Indonesia South Sulawesi
affected 12000 Indonesia South Sulawesi
affected 8355 Indonesia Southeast Sulawesi
affected 13244 Indonesia Gorontalo City
affected 9260 Indonesia South Aceh Regency
affected 6657 Indonesia Aceh Jaya Regency
affected 300 Indonesia East Aceh Regency
displaced 175 Indonesia Subulussalam
displaced 1211 Indonesia Southeast Sulawesi
displaced 240 Indonesia Kepulauan Sula Regency
displaced 14483 Indonesia South Sulawesi
displaced 453 Indonesia Gorontalo City
injured 3 Indonesia West Papua
SENDAI Indicator C N Country Location Info
houses 1349 Indonesia Tanah Laut Regency
houses 700 Indonesia Sanggau
houses 719 Indonesia Wajo
houses damaged 5000 Indonesia South Sulawesi
houses damaged 1671 Indonesia Southeast Sulawesi
houses damaged 915 Indonesia South Aceh Regency
houses damaged 2300 Indonesia Aceh Jaya Regency
houses destroyed 10 Indonesia South Sulawesi

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 08 Jul 2020 13 Jul 2020 FloodList
2 0 deaths 06 Jul 2020 08 Jul 2020 FloodList
3 0 deaths and 240 displaced 04 Jul 2020 07 Jul 2020 FloodList
4 30 deaths and 14483 displaced 09 Jul 2020 16 Jul 2020 FloodList
5 0 deaths and 1211 displaced 15 Jul 2020 18 Jul 2020 FloodList
6 3 deaths 15 Jul 2020 18 Jul 2020 FloodList
7 0 deaths and 453 displaced 23 Jul 2020 29 Jul 2020 FloodList
8 0 deaths and 175 displaced 25 Jul 2020 25 Jul 2020 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.