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: 1100960
Deaths: 0
Displaced: -
Region:
Countries: United States
From - To 17 Jul - 19 Jul
Known identifiers for this event:

GDACS Score

For more info on GDACS alert score click here.

Impact Assessement as of 19-07-2021

Satellite Observation

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2021-07-07 / 2021-08-25  

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

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 16 Jul 2021 17 Jul 2021 GLOFAS
2 0 deaths 19 Jul 2021 20 Jul 2021 GLOFAS
3 0 deaths 17 Jul 2021 19 Jul 2021 GLOFAS
4 0 deaths 15 Jul 2021 17 Jul 2021 GLOFAS
5 0 deaths GLOFAS
6 0 deaths 24 Jul 2021 27 Jul 2021 GLOFAS
7 2 deaths 20 Jul 2021 21 Jul 2021 GLOFAS
8 1 deaths 20 Jul 2021 21 Jul 2021 GLOFAS
9 0 deaths 28 Jul 2021 02 Aug 2021 GLOFAS
10 0 deaths 28 Jul 2021 31 Jul 2021 GLOFAS
11 2 deaths and 30 displaced 22 Jul 2021 31 Jul 2021 GLOFAS
12 1 deaths 29 Jul 2021 31 Jul 2021 GLOFAS
13 0 deaths 26 Jul 2021 28 Jul 2021 GLOFAS
14 1 deaths 26 Jul 2021 02 Aug 2021 GLOFAS
15 0 deaths 02 Aug 2021 04 Aug 2021 GLOFAS
16 0 deaths 07 Aug 2021 08 Aug 2021 GLOFAS
17 0 deaths 09 Aug 2021 10 Aug 2021 GLOFAS
18 4 deaths and 50 displaced 14 Aug 2021 18 Aug 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.