Grand Isle County Disaster Risk

Grand Isle County has a FEMA National Risk Index rating of Very Low, placing it in the 2th percentile nationally out of 3,144 counties. This composite score reflects the county's overall exposure to natural hazards including floods, wildfires, tornadoes, earthquakes, and hurricanes, weighted by expected annual loss and social vulnerability.

Grand Isle County is evaluated for five major natural hazard types: hurricane (35th percentile), earthquake (31th percentile), flooding (13th percentile), tornado (5th percentile), wildfire (5th percentile). The highest-risk hazard is hurricane at the 35th percentile nationally. These scores are derived from FEMA's National Risk Index, which analyzes expected annual loss, social vulnerability, and community resilience for each hazard type.

Grand Isle County's composite risk percentile is 2th, compared to the Vermont state average of 36th percentile. The state's overall risk rating is Very Low. This means Grand Isle County faces lower natural disaster risk than the typical county in Vermont.

Yes, Grand Isle County's hurricane risk is at the 35th percentile nationally. This is below the national median, indicating relatively lower exposure. For flooding specifically, Grand Isle County is at the 13th percentile.

FEMA's National Risk Index (NRI) calculates risk scores for 18 natural hazard types across all U.S. counties and census tracts. The composite score combines Expected Annual Loss (estimated dollar losses from each hazard), Social Vulnerability (demographic factors affecting disaster impact), and Community Resilience (ability to recover). Percentile scores rank each county against all 3,144 U.S. counties, and risk ratings range from Very Low to Very High.

Grand Isle County's composite risk score of 2th percentile is below the Vermont state average of 36th percentile, indicating relatively lower exposure to natural hazards. However, no county is completely risk-free. The primary hazard type is hurricane at the 35th percentile. Residents should still maintain emergency preparedness plans and appropriate insurance coverage.