Silver Bow County Disaster Risk

Silver Bow County has a FEMA National Risk Index rating of Very Low, placing it in the 38th 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.

Silver Bow County is evaluated for five major natural hazard types: earthquake (87th percentile), wildfire (81th percentile), flooding (22th percentile), tornado (10th percentile). The highest-risk hazard is earthquake at the 87th 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.

Silver Bow County's composite risk percentile is 38th, compared to the Montana state average of 33th percentile. The state's overall risk rating is Very Low. This means Silver Bow County faces higher natural disaster risk than the typical county in Montana.

Yes, Silver Bow County's earthquake risk is at the 87th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Silver Bow County is at the 22th 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.

Silver Bow County's composite risk score of 38th percentile is above the Montana state average of 33th percentile. This elevated risk is driven by earthquake exposure (87th percentile), along with wildfire risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.