Cars sit in floodwaters along Interstate 45 after heavy overnight rain flooded parts of the highway in Houston, Tuesday, May 26, 2015. Several major highways in the Houston area are closed due to high water. (AP Photo/David J. Phillip)Domingo Molina, right, paddles with his granddaughters Crystal, left, and Alicia, center, down a flooded street in Houston, Tuesday, May 26, 2015. Heavy rain overnight caused flooding and closure of sections of highways in the Houston area. (AP Photo/David J. Phillip)Cars remain stranded along a flooded section of Interstate 45 after heavy rains overnight in Houston, Tuesday, May 26, 2015. Several major highways are closed in the Houston area due to high water. (AP Photo/David J. Phillip)Jerni Self sweeps mud from the Easter family home after the West Cache Creek overflowed and flooded the area in Cache, Okla., Sunday, May 24, 2015. (Sarah Phipps/The Oklahoman via AP)