Roanoke County Disaster Risk

Roanoke County has a FEMA National Risk Index rating of Relatively Low, placing it in the 52th 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.

Roanoke County is evaluated for five major natural hazard types: flooding (69th percentile), hurricane (68th percentile), earthquake (58th percentile), wildfire (32th percentile), tornado (25th percentile). The highest-risk hazard is flooding at the 69th 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.

Roanoke County's composite risk percentile is 52th, compared to the Virginia state average of 33th percentile. The state's overall risk rating is Very Low. This means Roanoke County faces higher natural disaster risk than the typical county in Virginia.

Yes, Roanoke County's flooding risk is at the 69th percentile nationally. This is above the national median.

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.

Roanoke County's composite risk score of 52th percentile is above the Virginia state average of 33th percentile. This elevated risk is driven by flooding exposure (69th percentile), along with hurricane and earthquake risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.