25 states with the most historic sites at risk of flooding

Due to the deterioration and fragility of historic buildings, as well as the long-term degradation of the natural environment around these structures, historic sites are often at serious risk of flooding. forklift identified historic buildings of national importance in the United States that are located in census tracts at very or relatively high risk of flooding using data from FEMA National Risk Index and the National Register of Historic Places. The National Park Service outlines six criteria for what makes a historic building on the Register of National Significance, a less restrictive designation than a National Historic Landmark. FEMA calculated flood risk for each census tract by combining geospatial and historical flood event data National Flood Insurance Program and NOAA. A maximum of three historic sites are listed for each state in order of flood risk, although many states on this list have more vulnerable sites overall. Colorado, Connecticut and Idaho had no nationally significant sites on the registry that were located in high-risk floodplains. as such they are absent from this list.

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