Henderson County Disaster Risk

Henderson County has a FEMA National Risk Index rating of Relatively Low, placing it in the 63th 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.

Henderson County is evaluated for five major natural hazard types: earthquake (93th percentile), tornado (80th percentile), hurricane (53th percentile), flooding (33th percentile), wildfire (19th percentile). The highest-risk hazard is earthquake at the 93th 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.

Henderson County's composite risk percentile is 63th, compared to the Tennessee state average of 53th percentile. The state's overall risk rating is Relatively Low. This means Henderson County faces higher natural disaster risk than the typical county in Tennessee.

Yes, Henderson County's earthquake risk is at the 93th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Henderson County is at the 33th 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.

Henderson County's composite risk score of 63th percentile is above the Tennessee state average of 53th percentile. This elevated risk is driven by earthquake exposure (93th percentile), along with tornado and hurricane risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.