Overall Green alert Flood
in United States

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: 1100960
Deaths: 0
Displaced: -
Region: Omaha
Countries: United States
From - To 07 Aug - 08 Aug
Known identifiers for this event:

GDACS Score

For more info on GDACS alert score click here.

Impact Assessement as of 11-08-2021

SENDAI Indicator B N Country Location Info
rescued 5 United States Omaha

Satellite Observation

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