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A sign indicates the height of floodwater on Route 288 during the aftermath of Hurricane Harvey August 27, 2017 in Houston. BRENDAN SMIALOWSKI/AFP/Getty Images
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A Texas National Guardsman carries a resident from her flooded home following Hurricane Harvey August 27, 2017, in Houston, Texas. Photo by Lt. Zachary West/Army National Guard via Getty Images
Homes are seen inundated with flooding from Hurricane Harvey on August 28. Photo by Joe Raedle/Getty Images
Naomi Coto carries Simba on her shoulders as they evacuate their home after the area was inundated with flooding. Photo by Joe Raedle/Getty Images
A resident walks down a flooded street in the upscale River Oaks neighborhood after it was inundated with water. Photo by Scott Olson/Getty Images
People wait in a city dump truck on an I-610 overpass for evacuation. BRENDAN SMIALOWSKI/AFP/Getty Images
People push a disabled car during the aftermath of Hurricane Harvey August 27, 2017, in Houston, Texas. BRENDAN SMIALOWSKI/AFP/Getty Images
People walk through flooded streets as the effects of Hurricane Harvey are seen August 27, 2017, in Galveston, Texas. BRENDAN SMIALOWSKI/AFP/Getty Images
A guage shows the depth of water at an underpass on Interstate 10, which has been inundated with flooding from Hurricane Harvey on August 27, 2017, in Houston, Texas. Photo by Scott Olson/Getty Images
A man powers his boat with a leaf blower as he floats around floodwater. Thomas B. Shea/AFP/Getty Images
A volunteer with a jet ski travels on intersection at Wallisville and Uvalde is underwater during Hurricane Harvey, Monday, August 28, 2017. Juan DeLeon/Icon Sportswire via Getty Images
People evacuate their homes after the area was inundated with flooding from Hurricane Harvey on August 28, 2017. Photo by Joe Raedle/Getty Images
People walk down a flooded street as they evacuate their homes after the area was inundated with flooding from Hurricane Harvey on August 28, 2017. Photo by Joe Raedle/Getty Images
Hurricane Harvey is photographed aboard the International Space Station as it intensified on its way toward the Texas coast on August 25, 2017. NASA via Getty Images