FEMA: Floods http://www.fema.gov/hazards/floods/
U.S. Federal Emergency Management Agency resources on the topic, including floodplain mapping and mitigation programs, advice on preparedness, reports on past floods, and legal information.
Floodplain Management http://www.floodplain.org/
Information about flooding, floodplains, and flood protection. Also links to other web resources related to floods, flooding, and floodplain management.
Knapp Associates http://www.knapp-assoc.com/
Providing information for homeowners, insurance companies, lenders, and real estate agencies for handling the before and afters of a flood.
Past Floods