Trempealeau County Disaster Risk

Trempealeau County has a FEMA National Risk Index rating of Relatively Low, placing it in the 59th 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.

Trempealeau County is evaluated for five major natural hazard types: flooding (67th percentile), tornado (60th percentile), wildfire (13th percentile), earthquake (5th percentile), hurricane (0th percentile). The highest-risk hazard is flooding at the 67th 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.

Trempealeau County's composite risk percentile is 59th, compared to the Wisconsin state average of 59th percentile. The state's overall risk rating is Relatively Low. This means Trempealeau County faces lower natural disaster risk than the typical county in Wisconsin.

Yes, Trempealeau County's flooding risk is at the 67th percentile nationally. This is above the national median.

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.

Trempealeau County's composite risk score of 59th percentile is below the Wisconsin state average of 59th percentile, indicating relatively lower exposure to natural hazards. However, no county is completely risk-free. The primary hazard type is flooding at the 67th percentile. Residents should still maintain emergency preparedness plans and appropriate insurance coverage.