Overall Green alert Flood for United States
in United States

Flood impact summary

Flood United States is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

GDACS ID: 1100855
Deaths: 0
Displaced: 250
Region: Trinity County, Bexar County, Sharp County, Taylor County, Benton County, Barry County, Taney County
Countries: United States
From - To 27 Apr - 03 May
Known identifiers for this event:

GDACS Score

For more info on GDACS alert score click here.

Impact Assessement as of 03-05-2021

SENDAI Indicator B N Country Location Info
displaced 100 United States Sharp County
displaced 150 United States Barry County
rescued 10 United States Taney County
rescued 10 United States Taylor County
rescued 10 United States Benton County
rescued 1 United States Trinity County
rescued 9 United States Bexar County

Satellite Observation

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2021-04-20 / 2021-05-10  

Tuesday 20/04Wednesday 21/04Thursday 22/04Friday 23/04Saturday 24/04Sunday 25/04Monday 26/04Tuesday 27/04Wednesday 28/04Thursday 29/04Friday 30/04Saturday 01/05Sunday 02/05Monday 03/05Tuesday 04/05Wednesday 05/05Thursday 06/05Friday 07/05Saturday 08/05Sunday 09/05Monday 10/05

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 and 250 displaced 27 Apr 2021 03 May 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.