Linn County Disaster Risk

Linn County has a FEMA National Risk Index rating of Relatively Moderate, placing it in the 88th 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.

Linn County is evaluated for five major natural hazard types: earthquake (98th percentile), flooding (86th percentile), wildfire (58th percentile), tornado (16th 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.

Linn County's composite risk percentile is 88th, compared to the Oregon state average of 63th percentile. The state's overall risk rating is Relatively Low. This means Linn County faces higher natural disaster risk than the typical county in Oregon.

Yes, Linn County's earthquake risk is at the 98th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Linn County is at the 86th 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.

Linn County's composite risk score of 88th percentile is above the Oregon state average of 63th percentile. This elevated risk is driven by earthquake exposure (98th percentile), along with flooding and wildfire risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.