Overall Green alert Flood for Mexico
in Mexico

Flood impact summary

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

GDACS ID: 1101055
Deaths: 17
Displaced: 500
Region: Mexico, Poza Rica, Xalapa
Countries: Mexico
From - To 19 Aug - 22 Sep
Known identifiers for this event:


For more info on GDACS alert score click here.

Impact Assessement as of 23-08-2021

SENDAI Indicator A N Country Location Info
death 1 Mexico Puerto Vallarta
death 4 Mexico Tlayacapan
death 2 Mexico Ecatepec
death 1 Mexico Unión Juárez
death 1 Mexico Chihuahua
death 1 Mexico Poza Rica
death 7 Mexico Xalapa
missing 1 Mexico Puerto Vallarta
missing 2 Mexico Unión Juárez
SENDAI Indicator B N Country Location Info
affected 3 Mexico El Grullo
affected 2 Mexico Melaque
affected 1 Mexico Tlalnepantla
affected 1600 Mexico Morelos
displaced 250 Mexico Oaxaca
displaced 250 Mexico San Juan del Río
rescued 3 Mexico Emiliano Zapata
rescued 6 Mexico Tlalnepantla
SENDAI Indicator C N Country Location Info
houses 300 Mexico Morelos
houses 5 Mexico Unión Juárez
houses - Mexico Santa María del Mar
houses 1000 Mexico Tlaquepaque
houses damaged 30 Mexico Cuauhtémoc
houses damaged 2 Mexico Chihuahua
houses damaged 500 Mexico Cihuatlán

Satellite Observation

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2021-08-12 / 2021-09-29  

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 1 deaths 19 Aug 2021 20 Aug 2021 GLOFAS
2 8 deaths 21 Aug 2021 22 Aug 2021 GLOFAS
3 1 deaths 27 Aug 2021 29 Aug 2021 GLOFAS
4 0 deaths GLOFAS
5 6 deaths 30 Aug 2021 01 Sep 2021 GLOFAS
6 0 deaths 11 Sep 2021 13 Sep 2021 GLOFAS
7 1 deaths 11 Sep 2021 13 Sep 2021 GLOFAS
8 0 deaths and 500 displaced 11 Sep 2021 14 Sep 2021 GLOFAS
9 0 deaths and 250 displaced 17 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.