Grant County Disaster Risk

Grant County has a FEMA National Risk Index rating of Relatively Low, placing it in the 61th 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.

Grant County is evaluated for five major natural hazard types: tornado (76th percentile), flooding (62th percentile), earthquake (30th percentile), wildfire (17th percentile), hurricane (15th percentile). The highest-risk hazard is tornado at the 76th 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.

Grant County's composite risk percentile is 61th, compared to the Wisconsin state average of 59th percentile. The state's overall risk rating is Relatively Low. This means Grant County faces higher natural disaster risk than the typical county in Wisconsin.

Yes, Grant County's tornado risk is at the 76th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Grant County is at the 62th 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.

Grant County's composite risk score of 61th percentile is above the Wisconsin state average of 59th percentile. This elevated risk is driven by tornado exposure (76th percentile), along with flooding risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.