February 28, 2022 - Flooding in Madagascar

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Heavy rains and destructive winds have battered the island nation of
Madagascar during the opening weeks of 2022. In January 2022, a series
of torrential tropical rainstorms were followed by tropical depression
and storm Ana. Early February brought Cyclones Batsirai and Dumako to
the island. When Tropical Cyclone Emnati made landfall along the
eastern coast on February 22, it made the fifth time in six weeks that
large storms formed over the Indian Ocean and then moved over
Madagascar. Heavy flooding has followed the storms, both in the north
and along the southeastern coast.

According to ReliefWeb, tropical Cyclone Emnati made landfall around in
Mangatsiatra village in Fitovinany Region, with wind gusts of between
150 km/h and 200 km/h (93 mph and 124 mph). This is on the southeastern
coast of the island. Rainfall in Mananjary, a town located well north
of landfall, was recorded at 109 mm (4.6 inches) following Emnati.
Emnati passed over areas that had been impacted by the torrential rains
carried by Tropical Cyclone Batsirai just 18 days prior.

On February 25, 2022, the Moderate Resolution Imaging Spectroradiometer
(MODIS) on board NASA’s Terra satellite acquired a false-color image
highlighting flooding across southeastern Madagascar. This type of
false-color image uses infrared and visible light to make it easy to
separate water from land. Vegetation appears bright green, water looks
dark, and cloud shows as white or pale blue. Black lines have been
overlain on the image to mark regional boundaries. This image makes it
clear that flooding is occurring all along the coastline and inland in
Atsimo-Atsinanana. Several inland rivers also appear to be overflowing.

While this image gives a reliable view of the flooding that followed
Cyclones Batsirai and Emnati, it is only one snapshot in time. To
better understand change over time, it is helpful to compare images
from before the storms and after. Thanks to the NASA Worldview app,
this is as easy and clicking a link. To view a comparison of two
false-color Terra MODIS images of the region (this one acquired on
February 24, and one acquired on January 30), click here.

Image Facts
Satellite: Terra
Date Acquired: 2/24/2022
Resolutions: 1km (75.1 KB), 500m (185 KB), 250m (453.9 KB)
Bands Used: 7,2,1
Image Credit: MODIS Land Rapid Response Team, NASA GSFC



https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2022-02-28

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