Aroostook County
Maine — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 80th
Aroostook County faces low composite natural disaster risk (NRI Risk Index score 80.4, 80th national percentile), driven primarily by winter weather and cold wave exposure. Expected annual loss across all 18 hazard types is $35M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Winter Weather | Very High | 29.67 / yr | $2M |
| Cold Wave | High | 9.11 / yr | $15M |
| Hurricane | Medium | 0.06 / yr | $2M |
| Landslide | Low | 2.32 / yr | $13K |
| Earthquake | Low | 0.00 / yr | $1M |
| Riverine Flood | Medium | 3.25 / yr | $14M |
| Ice Storm | Medium | 0.12 / yr | $165K |
| Strong Wind | Medium | 0.70 / yr | $498K |
| Lightning | Low | 16.60 / yr | $206K |
| Avalanche | Very Low | 0.01 / yr | $277 |
| Drought | Low | 1.71 / yr | $68K |
| Hail | Very Low | 0.27 / yr | $86K |
| Wildfire | Very Low | 0.00 / yr | $9K |
| Tornado | Very Low | 0.25 / yr | $125K |
| Heat Wave | Very Low | 0.40 / yr | $28K |
| 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 Aroostook County?
Aroostook County has a composite FEMA National Risk Index score of 80.4 out of 100, placing it in the Low category and the 80th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Aroostook County?
The three highest-rated hazards are Winter Weather (Very High, $2M EAL), Cold Wave (High, $15M EAL), Hurricane (Medium, $2M EAL). These account for most of the county's expected annual losses.
How does Aroostook County compare to other Maine counties?
Aroostook County ranks #2 of 16 Maine 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. Aroostook County's $35M EAL is a statistical average, not a guarantee for any specific year or address.