The National Risk Index is a dataset and online tool to help illustrate the United States communities most at risk for 18 natural hazards. It was designed and built by FEMA in close collaboration with various stakeholders and partners in academia; local, state and federal government; and private industry.Learn more about the Risk Index ContributorsThe Risk Index leverages available source data for natural hazard and community risk factors to develop a baseline risk measurement for each United States county and Census tract.The 18 natural hazards included in the National Risk Index are:AvalancheCoastal FloodingCold WaveDroughtEarthquakeHailHeat WaveHurricaneIce StormLandslideLightningRiverine FloodingStrong WindTornadoTsunamiVolcanic ActivityWildfireWinter WeatherIn the National Risk Index, natural hazards are represented in terms of Expected Annual Loss, which incorporate data for exposure, annualized frequency, and historic loss ratio.This dataset is represented in three different formats:* Geodatabase - files with GDB in the name are geodatabase format.* Shape files - files with Shapefile in the name are in shapefile format.* CSV - files with Table in the name are in CSV format.