Harrison County
West Virginia — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 74th
Harrison County faces low composite natural disaster risk (NRI Risk Index score 73.6, 74th national percentile), driven primarily by riverine flood and landslide exposure. Expected annual loss across all 18 hazard types is $28M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Riverine Flood | Medium | 2.79 / yr | $25M |
| Landslide | Low | 1.07 / yr | $25K |
| Hail | Medium | 2.03 / yr | $589K |
| Lightning | Medium | 45.57 / yr | $493K |
| Hurricane | Low | 0.02 / yr | $194K |
| Winter Weather | Low | 9.53 / yr | $75K |
| Earthquake | Very Low | 0.00 / yr | $265K |
| Ice Storm | Low | 0.15 / yr | $80K |
| Strong Wind | Low | 1.08 / yr | $409K |
| Heat Wave | Low | 1.89 / yr | $194K |
| Drought | Low | 2.93 / yr | $37K |
| Tornado | Low | 0.05 / yr | $588K |
| Wildfire | Very Low | 0.00 / yr | $9K |
| Cold Wave | Very Low | 1.58 / yr | $158K |
| Avalanche | Very Low | 0.01 / yr | $8 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Harrison County?
Harrison County has a composite FEMA National Risk Index score of 73.6 out of 100, placing it in the Low category and the 74th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Harrison County?
The three highest-rated hazards are Riverine Flood (Medium, $25M EAL), Landslide (Low, $25K EAL), Hail (Medium, $589K EAL). These account for most of the county's expected annual losses.
How does Harrison County compare to other West Virginia counties?
Harrison County ranks #9 of 55 West Virginia counties for overall natural disaster risk, with a low rating.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. Harrison County's $28M EAL is a statistical average, not a guarantee for any specific year or address.