Somerset County
Pennsylvania — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 64th
Somerset County faces low composite natural disaster risk (NRI Risk Index score 64.2, 64th national percentile), driven primarily by landslide and riverine flood exposure. Expected annual loss across all 18 hazard types is $22M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Landslide | Low | 1.12 / yr | $17K |
| Riverine Flood | Medium | 1.79 / yr | $18M |
| Lightning | Medium | 39.66 / yr | $657K |
| Winter Weather | Medium | 26.22 / yr | $154K |
| Hurricane | Low | 0.03 / yr | $721K |
| Strong Wind | Medium | 2.73 / yr | $715K |
| Hail | Low | 2.30 / yr | $377K |
| Earthquake | Very Low | 0.00 / yr | $315K |
| Drought | Low | 0.31 / yr | $141K |
| Avalanche | Very Low | 0.01 / yr | $335 |
| Wildfire | Very Low | 0.00 / yr | $25K |
| Tornado | Low | 0.31 / yr | $631K |
| Ice Storm | Low | 0.29 / yr | $29K |
| Heat Wave | Very Low | 0.42 / yr | $58K |
| Cold Wave | Very Low | 4.11 / yr | $95K |
| 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 Somerset County?
Somerset County has a composite FEMA National Risk Index score of 64.2 out of 100, placing it in the Low category and the 64th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Somerset County?
The three highest-rated hazards are Landslide (Low, $17K EAL), Riverine Flood (Medium, $18M EAL), Lightning (Medium, $657K EAL). These account for most of the county's expected annual losses.
How does Somerset County compare to other Pennsylvania counties?
Somerset County ranks #42 of 67 Pennsylvania 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. Somerset County's $22M EAL is a statistical average, not a guarantee for any specific year or address.