A preliminary look at sea level rise and coastal flooding impacts, through nationally consistent data sets and analyses. The data and maps in this tool illustrate the scale of potential flooding, not the exact location, and do not account for erosion, subsidence, or future construction. Water levels are shown as they would appear during the highest high tides (excludes wind driven tides). https://web.archive.org/web/*/https://coast.noaa.gov/slrdata/