Residents are evacuated as floodwaters from Hurricane Harvey rise Monday, Aug. 28, 2017, in Spring, Texas. (David J. Phillip/AP Photo)
A woman is helped by rescue personnel while being evacuated as floodwaters from Hurricane Harvey rise Monday, Aug. 28, 2017, in Houston. (David J. Phillip/AP Photo)
Evacuees make their way though floodwaters near the Addicks Reservoir as floodwaters from Hurricane Harvey rise Tuesday, Aug. 29, 2017, in Houston. (David J. Phillip/AP Photo)
Rescue boats fill Tidwell Road as they help flood victims evacuate as floodwaters from Hurricane Harvey rise Monday, Aug. 28, 2017, in Houston. (David J. Phillip/AP Photo)
Houston Police SWAT officer Daryl Hudeck carries Catherine Pham and her 13-month-old son Aiden after rescuing them from their home surrounded by floodwaters. (David J. Phillip/AP Photo)
People push a stalled pickup through a flooded street in Houston, after Tropical Storm Harvey dumped heavy rains, Sunday, Aug. 27, 2017. (Charlie Riedel/AP Photo)
Residents are evacuated from their homes surrounded by floodwaters from Hurricane Harvey Sunday, Aug. 27, 2017, in Houston, Texas. (David J. Phillip/AP Photo)
Members of the Louisiana Department of Wildlife and Fisheries and the Houston Fire Department rescue residents stranded from floodwaters. (Gerald Herbert/AP)
Sgt. Chad Watts, of the Louisiana Department of Wildlife and Fisheries, holds Madelyn Nguyen, 2, after he rescued her and her family by boat from floodwaters. (Gerald Herbert/AP)
Wilford Martinez, bottom, grabs the median as he is rescued from his flooded car along Interstate 610 in floodwaters from Hurricane Harvey on Sunday, Aug. 27, 2017, in Houston. (David J. Phillip/AP Photo)
A woman is helped to a bus as she and other are evacuated as the outer bands of Hurricane Harvey begin to make landfall, Friday, Aug. 25, 2017, in Corpus Christi, Texas. (Eric Gay/AP Photo)
Power company workers repair damaged power lines damages from Hurricane Harvey Saturday, Aug. 26, 2017, in Katy, Texas. (David J. Phillip/AP Photo)
Carlos Torres, center, is helped through a fence after driving his tractor-trailer into a freeway flooded by Hurricane Harvey on Sunday, Aug. 27, 2017, near downtown Houston. (Charlie Riedel/AP)
Miguel Juarez, right, offers free water to passing vehicles Sunday, Aug. 27, 2017, in Rockport, Texas. (Eric Gay/AP Photo)
Residents pick through needed items at a make-shift aid station, Sunday, Aug. 27, 2017, in Rockport, Texas. (Eric Gay/AP Photo)