Detailed tables (and some maps) at the county level of aggregation supporting figures and tables from Titus, James. G. "Population in floodplains or close to sea level increased in US but declined in some counties—especially among Black residents". Environmental Research Letters. https://doi.org/10.1088/1748-9326/acadf5 The block-level results, intermediate 30-meter resolution data sets (500 GB), more county results, and associated elevation maps are available from the Climate Science and Impacts Branch. Citation information for this dataset can be found in the EDG's Metadata Reference Information section and Data.gov's References section.