Overall Green alert Flood for Thailand
in Thailand

Flood impact summary

Flood Thailand 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: Chiang Mai, Lampang, Tak, Phetchaburi, Phichit, Chaiyaphum, Loei, Nakhon Ratchasima, Prachin Buri, Chanthaburi, Phra Nakhon Si Ayutthaya
Countries: Thailand
From - To 23 Aug - 22 Sep
Known identifiers for this event:

GDACS Score

For more info on GDACS alert score click here.

Impact Assessement as of 27-09-2021

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

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2021-08-16 / 2021-09-29  

Monday 16/08Tuesday 17/08Wednesday 18/08Thursday 19/08Friday 20/08Saturday 21/08Sunday 22/08Monday 23/08Tuesday 24/08Wednesday 25/08Thursday 26/08Friday 27/08Saturday 28/08Sunday 29/08Monday 30/08Tuesday 31/08Wednesday 01/09Thursday 02/09Friday 03/09Saturday 04/09Sunday 05/09Monday 06/09Tuesday 07/09Wednesday 08/09Thursday 09/09Friday 10/09Saturday 11/09Sunday 12/09Monday 13/09Tuesday 14/09Wednesday 15/09Thursday 16/09Friday 17/09Saturday 18/09Sunday 19/09Monday 20/09Tuesday 21/09Wednesday 22/09Thursday 23/09Friday 24/09Saturday 25/09Sunday 26/09Monday 27/09Tuesday 28/09Wednesday 29/09

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 GLOFAS
2 0 deaths 23 Aug 2021 25 Aug 2021 GLOFAS
3 1 deaths 03 Sep 2021 12 Sep 2021 GLOFAS
4 0 deaths 16 Sep 2021 22 Sep 2021 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.