Weber County Disaster Risk

Weber County has a FEMA National Risk Index rating of Relatively Moderate, placing it in the 87th 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.

Weber County is evaluated for five major natural hazard types: earthquake (98th percentile), wildfire (94th percentile), flooding (68th percentile), tornado (32th percentile). The highest-risk hazard is earthquake at the 98th 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.

Weber County's composite risk percentile is 87th, compared to the Utah state average of 36th percentile. The state's overall risk rating is Very Low. This means Weber County faces higher natural disaster risk than the typical county in Utah.

Yes, Weber County's earthquake risk is at the 98th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Weber County is at the 68th 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.

Weber County's composite risk score of 87th percentile is above the Utah state average of 36th percentile. This elevated risk is driven by earthquake exposure (98th percentile), along with wildfire and flooding risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.