"During Memorial Day weekend in 2015, flood warnings were issued in many parts of Texas as record amounts of torrential rains were unleashed on already saturated grounds. Many residents in harm's way had to flee their homes and seek temporary shelter, while hundreds of other homeowners previously in the high-risk flood plain were no longer threatened. They had been able to move from homes previously subject to repetitive flooding thanks to the Harris County Flood Control District's (HCFCD) Voluntary Buyout Program. Buyouts, also called acquisition and relocation projects, allow residents to voluntarily sell their repetitive loss properties to the county and receive fair market value before disaster strikes again. The houses are cleared from the floodplain, which is returned to its natural state."
Federal Emergency Management Agency: http://www.fema.gov/