USA – Hurricane Harvey Floods Seen From Space

Hurricane Harvey caused catastrophic flooding in south eastern Texas from 26 August, 2017. Over 40 deaths have been reported. As many as 7,000 homes were destroyed and as of 01 September, 35,000 people were still in temporary shelters.

According to the National Weather Service, 51.88 inches of rain were recorded at Cedar Bayou, Texas—the highest rainfall total for any storm in recorded U.S. history.

Satellite images from NASA below show the extent of the flooding.

The first  image was acquired on 20 August, well before the Hurricane made landfall.

The second image was taken on 31 August, and shows vast areas of darker blue, indicating flood water around the Brazos and Colorado rivers, Houston, Galveston and eastwards towards the Beaumont and Port Arthur areas.

Before the Harvey floods in Texas seen from space. Image credit: NASA
Huricane Harvey floods in Texas seen from space: Image credit: NASA

About the images, NASA says:

“On August 31, 2017, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite acquired a false-color image (top) of extensive flooding along the Texas coast and around the Houston metropolitan area in the aftermath of Hurricane Harvey. A second image shows the same area on August 20, four days before the storm made landfall.

“Both images were made with a combination of visible and infrared light (MODIS bands 7-2-1) that highlights the presence of water on the ground. Water is generally dark blue or black in this type of image, but rivers also can appear light blue because they carry large amounts of suspended sediment. Turn on the image-comparison tool to spot areas that have been inundated by rainwater and coastal surges.”

Flood Summary

Last updated: September 6, 2017
Event
Hurricane Harvey, USA, August 2017
Date
August 26, 2017
Type
Urban flood, River flood, Storm surge
Cause
Storm surge, Extreme rainfall

Locations

A - Cypress
B - Spring
C - Katy
D - Barker Dam
E - Addicks Dam
F - Alvin
G - Atascocita
H - South Houston
I - Houston
J - Mont Belvieu
K - Clear Creek Village
L - Baytown
M - Rockport
N - Port Arthur
O - Beaumont
P - Lake Charles, Louisiana

Magnitude

Rainfall level
680 mm in 24 hours
Pearland, Brazoria County - August 26 to August 27, 2017
Rainfall level
584 mm in 24 hours
Alvin, Brazoria County - August 26 to August 27, 2017
Rainfall level
697.23 mm in 24 hours
Dayton, Liberty County - August 26 to August 27, 2017
Rainfall level
558 mm in 24 hours
South Houston - August 26 to August 27, 2017
Rainfall level
622.3 mm in 24 hours
Santa Fe, Galveston County - August 26 to August 27, 2017
Rainfall level
511 mm in 24 hours
Mount Houston - August 26 to August 27, 2017
Rainfall level
604 mm in 24 hours
Bacliff, Galveston County - August 26 to August 27, 2017
River level
12.04 metres
Greens Bayou at Houston - August 28 to August 28, 2017
level as of 28 August: 39.51 feet / Previous record: 39.4 feet
River level
39.05 metres
Cypress Creek near Cypress - August 28 to August 28, 2017
level as of 28 August: 128.11 feet / Previous record: 127.6 feet
River level
29.27 metres
Cypress Creek near Westfield - August 28 to August 28, 2017
level as of 28 August: 96.06 feet / Previous record: 94.3 feet
River level
11.04 metres
Navidad River at Sublime - August 28 to August 28, 2017
level as of 28 August: 36.23 feet / Previous record: 34 feet
River level
8.97 metres
Navidad River near Speaks - August 28 to August 28, 2017
level as of 28 August: 29.44 feet / Previous record: 28.2 feet
River level
20.56 metres
Buffalo Bayou at Piney Point Village - August 28 to August 28, 2017
level as of 28 August: 67.46 feet / Previous record: 61.23 feet

Damages

Evacuated
35,000
August 26 to August 31, 2017
35,000 people were evacuated and staying in over 200 shelters. According to media reports, over 1 million people were displaced overall: in Texas: 779,000 mandatory evacuations; 980,000 voluntary evacuations. In Louisiana: 7,000 mandatory evacuations; 133,000 voluntary evacuations (source: Reuters)
Fatalities
44 people
August 26 to August 31, 2017
According to media reports
Buildings destroyed
7,000
August 26 to August 31, 2017

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