Flood Proofing Cities

San Antonio: Problem
Texas is one of America's most flood-vulnerable states. Severe rains can cause water to rise across dozens of counties quickly and simultaneously, destroying homes and highways and threatening the downtown areas of major cities such as Houston and San Antonio. In 2002, as much as two feet of rain fell on southeastern Texas in a week, flooding three major river systems along the Gulf of Mexico and inundating highways such as this one outside of Houston.