The National Hurricane Center (NHC) and the Office for Coastal Management are providing high-resolution interactive national inundation risk maps and data via an online web mapping service. NHC utilizes the hydrodynamic Sea, Lake, and Overland Surges from Hurricanes (SLOSH) model to simulate storm surge in 27 basins along the U.S. East and Gulf Coasts. Based on climatology, tens of thousands of hypothetical hurricanes are simulated in each basin and the potential storm surges are calculated. Composites of the resulting storm surges are created to assess and visualize overall storm surge risk based on a wide range of possibilities. The maps can be found via www.amwa.net/stormsurge.