Natural disaster risk in Northern Mariana Islands, by county

How to read these ratings

• Ratings run in five steps: very low, relatively low, relatively moderate, relatively high and very high. They compare a county with every other US county; they are not a measure of danger on their own.
• Scores run from 0 to 100 and are national percentiles. The bar shows the score: a score of 80 means a higher value than 80% of US counties.
• Overall risk combines the expected annual loss with social vulnerability and community resilience.
• Expected annual loss is the average yearly loss to buildings, people and agriculture the model expects from all 18 hazards.
• Social vulnerability describes how hard it may be for people to prepare for and recover from a disaster. Higher is worse.
• Community resilience describes a community's ability to prepare, adapt and recover. Higher is better.
• "Not applicable" means FEMA does not model that hazard there (for example, hurricanes far inland).

About this data

Source: FEMA National Risk Index, version 1.20, released December 2025, published by the Federal Emergency Management Agency (US public domain). About the National Risk Index. The index is a model of relative risk built from historical hazard records, what is exposed and community factors. It is not a forecast, it does not describe any single property, and it is not insurance or financial advice. For decisions about a specific address, check FEMA's flood maps and your local emergency management office.