Amends the Metro-East Sanitary District Act of 1974. Changes the Act's short title to the Metro-East Flood Prevention District Act. Changes the name of the Metro-East Sanitary District to the Metro-East Flood Prevention District. Makes conforming changes in the Department of Natural Resources Act, the Flood Prevention District Act, the Southwestern Illinois Metropolitan and Regional Planning Act, the Sanitary District Act of 1907, the North Shore Water Reclamation District Act, the Sanitary District Act of 1917, the Public Utilities Act, the Eminent Domain Act, and the Local Governmental and Governmental Employees Tort Immunity Act.