Overall Red alert Flood for Nigeria
in Nigeria

Flood impact summary

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

GDACS ID: 1101659
Deaths: 605
Displaced: 1306000
Region: Bayelsa State, Delta State, Anambra State, Abuja, Cross River State, Rivers State, Bayelsa State
Countries: Nigeria
From - To 10 Sep - 26 Oct
Known identifiers for this event: FL-2022-000350-NGA


For more info on GDACS alert score click here.

Impact Assessement as of 21-10-2022

SENDAI Indicator A N Country Location Info
death 2 Nigeria Lagos
death 603 Nigeria -
SENDAI Indicator B N Country Location Info
affected 35200 Nigeria Uzo-Uwani
affected 2504000 Nigeria Bayelsa State, Delta State, Anambra State, Abuja, Cross River State, Rivers State
affected 1 Nigeria Mariga
displaced 3000 Nigeria Lokoja
displaced 1303000 Nigeria Cross River State, Delta State, Rivers State, Bayelsa State, Abuja, Anambra State
injured 2400 Nigeria Delta State, Abuja, Anambra State, Cross River State, Rivers State, Bayelsa State
rescued 9 Nigeria Maryland
SENDAI Indicator C N Country Location Info
agriculture 53800 Nigeria Uzo-Uwani
houses 1 Nigeria Maryland
houses damaged 500 Nigeria Lokoja
houses damaged - Nigeria Uzo-Uwani
SENDAI Indicator D N Country Location Info
bridges damaged - Nigeria Uzo-Uwani
roads - Nigeria Uzo-Uwani

Satellite Observation

Satellite-based Flood extent provided by GLOFAS
Overall of the satellite-based flooded area from / to : 2022-09-03 / 2022-11-02  

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 2 deaths 10 Sep 2022 12 Sep 2022 GLOFAS
2 0 deaths 15 Sep 2022 17 Sep 2022 GLOFAS
3 0 deaths and 3000 displaced 23 Sep 2022 25 Sep 2022 GLOFAS
4 0 deaths 01 Oct 2022 03 Oct 2022 GLOFAS
5 603 deaths and 1303000 displaced 01 Oct 2022 26 Oct 2022 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.