Relatively high water that overflows the natural or artificial banks of a stream or coastal area that submerges land not normally below water level.
- Water resources of Washington State - Flood hazards [More info]
- Description of the Flood Hazards study project by Water Resources Program in Tacoma, Washington with links to other flood hazard projects.
- Water resources of the United States [More info]
- Primary homepage for USGS programs in water resources with links to water data, publications and products, technical resources, major programs, and water information services.