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Overall Orange Flood alert in Madagascar from 07 Mar 2017 00:00 UTC to 13 Mar 2017 00:00 UTC
GDACS Event Report - Flood impact

Summary

Description: Tropical Cyclone ENAWO made landfall over north-eastern Madagascar on 7 March and then moved west south-west over land and towards the southern areas, crossing the country. Severe weather, including heavy rain, strong winds and storm surge, has been affecting the country, causing casualties and damage. As of 13 March, the Bureau National de Gestion des Risques et des Catastrophes (BNGRC) of Madagascar reported that the death toll has reached at least 50 people. They also reported 20 people missing, 195 people injured, 84 660 people displaced. The most affected regions due to strong winds, heavy rain and storm surge are Sava, Analamanga, Analanjirofo and Atsinanana. The Copernicus EMS was activated on 7 March. As of 13 March, the numbers of deaths and displaced people are those attributed to all effects of Tropical Cyclon ENAWO, not only to the connected flood events.

This flood is expected to have a medium humanitarian impact based on the magnitude and the affected population and their vulnerability.

  • Duration: 07/03/17 to 13/03/17
  • Impact: 50 killed and 84660 displaced

Locations affected:

  • regions: Alaotra Mangoro, Amoron I Mania, Androy, Atsimo Andrefana, Atsimo Atsinanana, Atsinanana, Diana, Haute Matsiatra, Ihorombe, Sava, Sofia, Vatovavy Fitovinany
  • provinces:
  • locations:

  • Severity: class 1 (i.e. large flood event with significant damage to structures or agriculture; fatalities; and/or 1-2 decades-long reported interval since the last similar event)

The alert score is based on the reported death and displaced. Red = 1000 or more people killed or 800000 or more people displaced or international assistance already required. Orange = 100 or more people killed or 80000 or more displaced.

Satellite observations

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.
Rain: Rainfall accumulaiton of the past 24h, as detected by the Global Precipitation Measurement mission of NASA. For more information, see https://www.nasa.gov/mission_pages/GPM/main/index.html.

The time evolution of all layers since the first day the flood event was recorded, can be seen by dragging the slider under the satellite map.

Timeline of revisions

For accessing reports of previous advisories, please click on the advisory number in the table below.

IDAlert ColorPopulation affectedSourceDate added
1 50 killed and 84660 displaced JRC 13 Mar 2017 17:50

More information

Data resources

For a full list of available products related to this event, please refer to the GDACS Data Resources page.

About the data

Information related to the flood has been collected from official and media reports by the Dartmouth Flood Observatory.

Disclaimer

While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information. The JRC is not responsible for any damage or loss resulting from the use of the information presented on this website.