We mapped “hotspots” of occurrence and magnitude of the most damaging hazards -flood, earthquake, hurricane, tornado, and wildfire- over the contiguous U.S. (CONUS) at 250m x 250m grid cells. We defined hotspots for each natural hazard as grids where the occurrence or intensity of the hazard exceeded the 90th percentile among all CONUS grids.

We used a unique dataset of over 350 million structures (homes, apartments, shops, offices, etc.) obtained under a data-sharing agreement with the Zillow Group, Inc., to identify where people live, work and recreate, and estimate trends in development.