Dauphin County
Pennsylvania — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 91th
Dauphin County faces medium composite natural disaster risk (NRI Risk Index score 91.1, 91th national percentile), driven primarily by winter weather and riverine flood exposure. Expected annual loss across all 18 hazard types is $100M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Winter Weather | Very High | 12.32 / yr | $1M |
| Riverine Flood | High | 2.04 / yr | $75M |
| Strong Wind | High | 4.75 / yr | $3M |
| Hurricane | Medium | 0.07 / yr | $7M |
| Heat Wave | Medium | 5.05 / yr | $3M |
| Lightning | High | 35.24 / yr | $1M |
| Earthquake | Low | 0.00 / yr | $4M |
| Landslide | Low | 0.59 / yr | $29K |
| Tornado | Medium | 0.28 / yr | $4M |
| Cold Wave | Medium | 1.21 / yr | $2M |
| Ice Storm | Low | 0.58 / yr | $94K |
| Drought | Low | 0.37 / yr | $141K |
| Avalanche | Very Low | 0.01 / yr | $287 |
| Wildfire | Very Low | 0.00 / yr | $25K |
| Hail | Very Low | 2.22 / yr | $89K |
| 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 Dauphin County?
Dauphin County has a composite FEMA National Risk Index score of 91.1 out of 100, placing it in the Medium category and the 91th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Dauphin County?
The three highest-rated hazards are Winter Weather (Very High, $1M EAL), Riverine Flood (High, $75M EAL), Strong Wind (High, $3M EAL). These account for most of the county's expected annual losses.
How does Dauphin County compare to other Pennsylvania counties?
Dauphin County ranks #11 of 67 Pennsylvania counties for overall natural disaster risk, with a medium 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. Dauphin County's $100M EAL is a statistical average, not a guarantee for any specific year or address.