Union County Disaster Risk

Union County has a FEMA National Risk Index rating of Relatively Low, placing it in the 58th 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.

Union County is evaluated for five major natural hazard types: tornado (79th percentile), earthquake (74th percentile), hurricane (71th percentile), wildfire (53th percentile), flooding (53th percentile). The highest-risk hazard is tornado at the 79th 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.

Union County's composite risk percentile is 58th, compared to the South Carolina state average of 71th percentile. The state's overall risk rating is Relatively Low. This means Union County faces lower natural disaster risk than the typical county in South Carolina.

Yes, Union County's tornado risk is at the 79th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Union County is at the 53th 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.

Union County's composite risk score of 58th percentile is below the South Carolina state average of 71th percentile, indicating relatively lower exposure to natural hazards. However, no county is completely risk-free. The primary hazard type is tornado at the 79th percentile. Residents should still maintain emergency preparedness plans and appropriate insurance coverage.