"FEMA developed a Flood Macro Wizard (Flood Wizard) that facilitates the preparation of flood risk assessments. The Flood Wizard allows you to automatically process flood data to evaluate exposure and develop loss estimates for the inventory in your study region. To use the Flood Wizard, 1. Install the Flood Wizard, 2. Execute the flood program, 3. Identify the inputs, 4. Run the analysis, and 5. View the results." The Flood Macro Wizard software is available for download at the bottom of the linked page.
Federal Emergency Management Agency: http://www.fema.gov/