Lancaster County Disaster Risk

Lancaster County has a FEMA National Risk Index rating of Very Low, placing it in the 32th 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.

Lancaster County is evaluated for five major natural hazard types: hurricane (85th percentile), flooding (61th percentile), earthquake (43th percentile), tornado (21th percentile), wildfire (18th percentile). The highest-risk hazard is hurricane at the 85th 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.

Lancaster County's composite risk percentile is 32th, compared to the Virginia state average of 33th percentile. The state's overall risk rating is Very Low. This means Lancaster County faces lower natural disaster risk than the typical county in Virginia.

Yes, Lancaster County's hurricane risk is at the 85th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Lancaster County is at the 61th 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.

Lancaster County's composite risk score of 32th percentile is below the Virginia state average of 33th percentile, indicating relatively lower exposure to natural hazards. However, no county is completely risk-free. The primary hazard type is hurricane at the 85th percentile. Residents should still maintain emergency preparedness plans and appropriate insurance coverage.