How was the National Risk Index developed?Ĭan't find the help you're looking for? Visit our Contact Us page and send your question(s) to the National Risk Index Team.What do the scores and ratings mean, and how do I interpret them?.How are all the terms used in the National Risk Index defined?.Areas with possible but undetermined flood hazards. Flood insurance rates are commensurate with the uncertainty of the flood risk. No flood hazard analysis has been conducted. ![]() What are the components used to calculate the National Risk Index? Areas with possible but undetermined flood hazards. Why should I use the National Risk Index? / What can it help with?.The Index leverages available source data for 18 natural hazards, social vulnerability, and community resilience to develop a baseline relative risk measurement for each U.S county and Census tract. ![]() See how different areas are affected by floods and compare with other GIS tools. The National Risk Index is a dataset and online tool to help illustrate the U.S communities most at risk for natural hazards. The new flood map, officially known as a Flood Insurance Rate Map (FIRM), identifies areas of flood risk (high, moderate, low).
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