Overall Green alert Flood
in Thailand

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: 1101066
Deaths: 1
Displaced: -
Region: Lom Sak District
Countries: Thailand
From - To 23 Aug - 18 Sep
Known identifiers for this event:


For more info on GDACS alert score click here.

Impact Assessement as of 14-09-2021

SENDAI Indicator A N Country Location Info
death 1 Thailand Lom Sak District
SENDAI Indicator B N Country Location Info
affected 1580 Thailand Thailand
affected 280 Thailand Pong District
affected 270 Thailand -
affected 70 Thailand -
affected 4000 Thailand -
affected 5 Thailand Chiang Mai
affected 150 Thailand Lampang
affected 21040 Thailand Tak
affected 21200 Thailand Phetchaburi
affected 16740 Thailand Phichit
affected 625 Thailand Chaiyaphum
affected 385 Thailand Loei
affected 2295 Thailand Nakhon Ratchasima
affected 8820 Thailand Prachin Buri
affected 50 Thailand Chanthaburi
affected 7330 Thailand Phra Nakhon Si Ayutthaya
SENDAI Indicator C N Country Location Info
houses damaged 50 Thailand Pong District
houses damaged 60 Thailand -

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 27 Aug 2021 30 Aug 2021 FloodList
2 0 deaths 23 Aug 2021 25 Aug 2021 FloodList
3 1 deaths 03 Sep 2021 12 Sep 2021 FloodList
4 0 deaths 16 Sep 2021 18 Sep 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.