This feature class contains yearly (2000-2019) natural hazard exposure estimates (percent area) at the county-level for the entire US (including AK, HI, and PR). Secondary data sources were used to collect both tabular and spatial hazard exposure information related to hurricanes, tropical storms, tornadoes, landslides, wildfires, drought, coastal and inland flooding, and earthquakes. Data origin, as well as information regarding temporal and geographic coverage, and methods for calculating exposure estimates are discussed later in this document on a per-hazard basis. Candidate secondary data was reviewed for accessibility, temporal and spatial scale, and data formatting. Target data acceptance criteria: open access, per year basis, and vector or raster data presentation. When multiple data sources were available for the same natural hazard, data sets were compared for comparability and the source most likely to continue publishing data was selected. In cases where data did not fully meet acceptance criteria, the best available data was used for further analysis.

This dataset is associated with the following publication: Summers, J., A. Lamper, C. Mcmillion, and L. Harwell. Observed Changes in the Frequency, Intensity, and Spatial Patterns of Nine Natural Hazards in the United States from 2000 to 2019. Sustainability. MDPI, Basel, SWITZERLAND, 14(7): 4158, (2022).