July 29, 2021 - Flooding in Central China
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A slow-moving rainstorm in mid-July 2021 caused rivers and reservoirs
to spill over their banks, leading to deadly flooding in central China.
A new storm has now come ashore, bringing even more rain to the
country. Flooding from the mid-July rainstorm was still visible on July
26, 2021, when the Moderate Resolution Imaging Spectroradiometer
(MODIS) on NASA’s Aqua satellite acquired a false-color image of
northern Henan province. In this type of image, vegetation appears
bright green and water appears deep blue. to the NASA Worldview App, a
comparison between the area on July 26, 2021, and July 20, 2020, can be
seen HERE.
According to news reports, the rainstorm dropped a year’s worth of rain
on Zhengzhou, the province’s capital city, over the span of three days.
The storm then tracked north and dropped 26 centimeters (10 inches) of
rain within a span of two hours on the city of Xinxiang. The region’s
network of rivers and reservoirs overflowed, and floodwaters submerged
transportation infrastructure and buildings, trapping many people and
affecting millions.
Forecasters are now watching the progression of Tropical Cyclone In-fa.
After lashing Japan, the Philippines, and Taiwan, Typhoon In-fa reached
eastern China’s coast on July 25 with sustained winds equivalent to a
Category-1 hurricane. Tens of thousands of people evacuated Shanghai
ahead of the storm, which brought high winds and heavy rain.
According to the South China Morning Post, by July 27 meteorologists
were blaming Typhoon In-Fa for abnormally intense rain to the region.
They also reported the extreme flooding in Henan has left at least 71
people dead. Flash flooding also has been reported in Jiangsu Province
on July 28, where the local meteorological observatory issued an orange
warning signal (second strongest level) for the downpour resulting from
the remnants of In-Fa.
Image Facts
Satellite: Terra
Date Acquired: 7/26/2021
Resolutions: 1km (342.2 KB), 500m (908.4 KB), 250m (477.3
KB)
Bands Used: 1,4,3
Image Credit: MODIS Land Rapid Response Team, NASA GSFC
https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2021-07-29
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