Texas from the air: Flooding from Harvey devastates coastal cities

Water from Addicks Reservoir flows into neighborhoods as floodwaters from Tropical Storm Harvey rise Tuesday, Aug. 29, 2017, in Houston. (AP Photo/David J. Phillip)

Flooding from Tropical Storm Harvey rushes over a roadway in Beaumont, Texas, Thursday, Aug. 31, 2017. (AP Photo/Gerald Herbert)

Floodwaters from Tropical Storm Harvey surround homes in Orange, Texas, Thursday, Aug. 31, 2017. (AP Photo/Gerald Herbert)

A home is surrounded by floodwaters from Tropical Storm Harvey on Tuesday, Aug. 29, 2017, in Houston. (AP Photo/David J. Phillip)

Airplanes sit at a flooded airport near the Addicks Reservoir as floodwaters from Tropical Storm Harvey rise Tuesday, Aug. 29, 2017, in Houston. (AP Photo/David J. Phillip)

Residents evacuate their homes near the Addicks Reservoir as floodwaters from Tropical Storm Harvey rise Tuesday, Aug. 29, 2017, in Houston. (AP Photo/David J. Phillip)

Water from Addicks Reservoir flows into neighborhoods as floodwaters from Tropical Storm Harvey rise Tuesday, Aug. 29, 2017, in Houston. (AP Photo/David J. Phillip)

Highways around downtown Houston are empty as floodwaters from Tropical Storm Harvey overflow from the bayous around the city Tuesday, Aug. 29, 2017, in Houston. (AP Photo/David J. Phillip)

Evacuees make their way though floodwaters near the Addicks Reservoir as floodwaters from Tropical Storm Harvey rise Tuesday, Aug. 29, 2017, in Houston. (AP Photo/David J. Phillip)

Homes are flooded near the Addicks Reservoir as floodwaters from Tropical Storm Harvey rise Tuesday, Aug. 29, 2017, in Houston. (AP Photo/David J. Phillip)

Interstate 10 is closed due to floodwaters from Tropical Storm Harvey Tuesday, Aug. 29, 2017, in Houston. (AP Photo/David J. Phillip)

Businesses and cars are flooded near the Addicks Reservoir as floodwaters from Tropical Storm Harvey rise Tuesday, Aug. 29, 2017, in Houston. (AP Photo/David J. Phillip)

Residents wade through floodwaters as they evacuate their homes near the Addicks Reservoir as floodwaters from Tropical Storm Harvey rise Tuesday, Aug. 29, 2017, in Houston. (AP Photo/David J. Phillip)

Interstate 69 is covered by floodwaters at the San Jacinto River bridge as floodwaters from Tropical Storm Harvey caused the river to overflow Tuesday, Aug. 29, 2017, in Humble, Texas. (AP Photo/David J. Phillip)

Residents evacuate their homes near the Addicks Reservoir as floodwaters from Tropical Storm Harvey rise Tuesday, Aug. 29, 2017, in Houston. (AP Photo/David J. Phillip)

In this aerial photo, floodwaters from Tropical Storm Harvey surround an apartment complex on Tuesday, Aug. 29, 2017, in Houston. Houston officials plan to open two or three more mega-shelters to accommodate people who continue to arrive at the overflowing George R. Brown Convention Center seeking refuge from Harvey’s record-breaking flooding. (Brett Coomer/Houston Chronicle via AP)

Homes are surrounded by floodwaters from Tropical Storm Harvey Tuesday, Aug. 29, 2017, in Spring, Texas. (AP Photo/David J. Phillip)

A burned out home is surrounded by floodwaters from Tropical Storm Harvey on Tuesday, Aug. 29, 2017, in Spring, Texas. (AP Photo/David J. Phillip)

Interstate 69 is covered by floodwaters from Tropical Storm Harvey Tuesday, Aug. 29, 2017, in Humble, Texas. (AP Photo/David J. Phillip)

Flooding from Tropical Storm Harvey covers roads in Beaumont, Texas, Thursday, Aug. 31, 2017. (AP Photo/Gerald Herbert)

Petroleum spill off flows through floodwaters in the aftermath of Tropical Storm Harvey in Beaumont, Texas, Thursday, Aug. 31, 2017. (AP Photo/Gerald Herbert)

Flooding from Tropical Storm Harvey surrounds buildings in Sabine Pass, Texas, next to the Gulf of Mexico, Thursday, Aug. 31, 2017. (AP Photo/Gerald Herbert)

People launch boats from an overpass into floodwaters in the aftermath of Tropical Storm Harvey in Kountze, Texas, Thursday, Aug. 31, 2017. (AP Photo/Gerald Herbert)

Barges, including several sunken ones, are clustered together at the port of Houston in the aftermath of Hurricane Harvey Friday, Sept. 1, 2017, in Houston. (AP Photo/Charlie Riedel)

Homes are surrounded by water from the flooded Brazos River in the aftermath of Hurricane Harvey Friday, Sept. 1, 2017, in Freeport, Texas. (AP Photo/Charlie Riedel)

People walk through water from the flooded Brazos River in the aftermath of Hurricane Harvey Friday, Sept. 1, 2017, in Freeport, Texas. (AP Photo/Charlie Riedel)

The guard tower at a Texas State prison unit is submerged by water from the flooded Brazos River in the aftermath of Hurricane Harvey Friday, Sept. 1, 2017, in Rosharon, Texas (AP Photo/Charlie Riedel)

Cars drive through flooded streets from Tropical Storm Harvey in Orange, Texas, Thursday, Aug. 31, 2017. (AP Photo/Gerald Herbert)