Aroostook County, Maine: Natural Disaster Risk and History
Aroostook County, Maine has a Relatively Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 80.4 out of 100, higher than about 80% of US counties, with winter storms, cold waves and hurricanes scoring highest of its 18 hazards and $35 million a year in expected losses.
OpenFEMA lists 22 federal disaster declarations that included Aroostook County since 1970, not counting 2 for COVID-19; the latest is EM-3598-ME (Hurricane Lee, declared 14 September 2023). NOAA's Storm Prediction Center recorded 30 tornadoes touching Aroostook County from 1950 to 2025.
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Population 67,034 Buildings worth $18 billion Area 6,896 sq mi Risk rank in Maine 2 of 16 FIPS 23003
All 18 hazards, highest risk first
FEMA National Risk Index| Hazard | Risk rating | Score | Expected loss a year | How often | Events in record |
|---|---|---|---|---|---|
| Winter weather | Very High | 99.2 | $1.6 million | about 3 a year | 564 |
| Cold wave | Relatively High | 97.6 | $15 million | about 9.1 a year | 173 |
| Hurricane | Relatively Moderate | 83.1 | $2.5 million | about once every 17 years | 48 |
| Landslide | Relatively Low | 80.4 | $13,301 | about 2.3 a year | — |
| Earthquake | Relatively Low | 77.7 | $1.1 million | about once every 305 years | — |
| Inland flooding | Relatively Moderate | 76.1 | $14 million | about 3.3 a year | 91 |
| Ice storm | Relatively Moderate | 68.5 | $164,526 | about once every 8.3 years | 8 |
| Strong wind | Relatively Moderate | 53.9 | $498,239 | about once every 1.4 years | 27 |
| Lightning | Relatively Low | 52.4 | $206,164 | about 17 a year | 113,637 strikes |
| Avalanche | Very Low | 44.2 | $277 | about once every 100 years | 0 |
| Drought | Relatively Low | 42.4 | $68,074 | about 1.7 a year | 140 |
| Hail | Very Low | 27.5 | $86,159 | about once every 3.7 years | 10 |
| Wildfire | Very Low | 26.2 | $9,336 | rarer than once in 1,000 years | — |
| Tornado | Very Low | 15.7 | $124,663 | about once every 4.1 years | 22 |
| Heat wave | Very Low | 14.7 | $28,398 | about once every 2.5 years | 7.6 |
| Coastal flooding | Not Applicable | — | — | — | — |
| Tsunami | Not Applicable | — | — | — | — |
| Volcanic activity | Not Applicable | — | — | — | — |
Score: FEMA's percentile among US counties that face the hazard (higher = more risk). Expected loss: FEMA's modelled average yearly loss to buildings, people (as a statistical value) and crops. How often: FEMA's annualised frequency of the hazard in the county; for some hazards it counts event-days, so it is a rough guide, not a forecast. "Not Applicable" means FEMA does not model that hazard here.
Federal disaster declarations 22
Most common: Snowstorm 9, Flood 6, Severe Storm 4, Hurricane 2.
| Decade | Declarations | Incident types |
|---|---|---|
| 1970s | 3 | Flood ×3 |
| 1990s | 5 | Flood ×2, Snowstorm ×2, Severe Storm |
| 2000s | 12 | Snowstorm ×7, Severe Storm ×2, Flood, Hurricane, Freezing |
| 2010s | 1 | Severe Storm |
| 2020s | 1 | Hurricane |
The last 10
Widest declarations that included Aroostook County
- Hurricane Lee (2023, EM-3598-ME): 16 Maine counties designated.
- Severe Ice Storms, Rains and High Winds (1998, DR-1198-ME): 16 Maine counties designated.
- Blizzards, Severe Winds & Snowfall, Coastal Storm (1993, EM-3099-ME): 16 Maine counties designated.
Named storms in its declarations: Hurricane Lee (2023), Hurricane Katrina (2005).
Not counted above: 2 COVID-19 ("Biological") declarations — in 2020 every US county was included. Maine also had 3 statewide declarations with no county list.
Tornado record since 1950 30
| Tornadoes touching the county | 30 |
|---|---|
| Strongest-rated | (E)F2 ×3 |
| Peak month | July (9) |
| Deadliest | 11 Aug 1954, F2, 1 mi path, 1 killed, 1 injured |
| Longest path | 15 Aug 1958, F2, 17 mi path |
| Most recent | 5 Aug 2017, EF1, 0.5 mi path |
| Deaths / injuries on those paths | 1 / 5 |
| Rating | (E)F0 | (E)F1 | (E)F2 | (E)F3 | (E)F4 | (E)F5 | Unrated |
|---|---|---|---|---|---|---|---|
| Count | 11 | 16 | 3 | 0 | 0 | 0 | 0 |
| Decade | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
|---|---|---|---|---|---|---|---|---|
| Count | 4 | 5 | 2 | 0 | 4 | 9 | 6 | 0 |
Deaths and injuries are for each tornado's whole path, which can run beyond this county. F-scale ratings before February 2007, Enhanced Fujita (EF) after.
How Aroostook County compares with its 5 nearest counties
| County | Distance | Overall risk | Score | Top hazard |
|---|---|---|---|---|
| Aroostook County (this page) | — | Relatively Low | 80.4 | Winter weather |
| Piscataquis County | 105 km | Relatively Low | 52.4 | Cold wave |
| Penobscot County | 140 km | Relatively Low | 78.0 | Winter weather |
| Somerset County | 165 km | Relatively Low | 67.9 | Winter weather |
| Washington County | 195 km | Relatively Low | 47.6 | Winter weather |
| Hancock County | 222 km | Relatively Low | 55.0 | Winter weather |
Nearest by distance between county centres. Every county in Maine, ranked.
Vulnerability and resilience
| Social vulnerability | Relatively High 67.6 |
|---|---|
| Community resilience | Relatively Moderate 51.9 |
| Community risk factor | 1.29 |
| Expected annual loss, all hazards | $35 million |
FEMA scales expected losses up where social vulnerability is high (people who may find it harder to prepare, evacuate or recover) and down where community resilience is high. A factor above 1 raises the risk score. For social vulnerability a high rating is worse; for resilience a high rating is better.
Prepare for Aroostook County's main hazards
- Right now: National Weather Service alerts for Maine · all official warnings on Global Incident Tracker.
- Winter weather: Power outages now · Carbon monoxide in winter
- Cold wave: Carbon monoxide in winter · Power outages now
- Hurricane: Is there a hurricane now? · Cyclone preparation
- Your property's flood zone: FEMA Flood Map Service Center ↗ — this page cannot tell you that.
- Official preparedness guidance: Ready.gov ↗ and your county emergency management office.
What this page shows, and what it misses
FEMA's National Risk Index rates a whole county against every other US county; it is a planning-level estimate for nationwide comparison, not a flood-zone map and not a substitute for a local risk assessment or the risk to one home. Declarations are presidential disaster, emergency and fire management declarations that named this county; state declarations and SBA or USDA designations are not included. Tornadoes are counted when the county is one of up to four listed on the track; 670 tornadoes that crossed a state line carry no county list in NOAA's file and are left out.
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties - v1.20.0 (December 2025). Retrieved from https://services.arcgis.com/XG15cJAlne2vxtgt/ArcGIS/rest/services/National_Risk_Index_Counties/FeatureServer/0/query on November 2, 2026, 1:20 PM EST. This product uses the Federal Emergency Management Agency’s National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Federal Emergency Management Agency (FEMA), OpenFEMA Dataset: Disaster Declarations Summaries - v2, retrieved from https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries on November 2, 2026, 1:21 PM EST. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Tornado records: NOAA/NWS Storm Prediction Center, Severe Weather Database, tornadoes 1950–2025 (https://www.spc.noaa.gov/wcm/data/1950-2025_actual_tornadoes.csv, downloaded 2 November 2026). Public domain; not endorsed by NOAA. Compiled by Global Incident Tracker.
Questions about Aroostook County
What natural disasters is Aroostook County, Maine most at risk from?
Aroostook County, Maine has a Relatively Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 80.4 out of 100, higher than about 80% of US counties, with winter storms, cold waves and hurricanes scoring highest of its 18 hazards and $35 million a year in expected losses.
How many federal disaster declarations has Aroostook County had?
OpenFEMA lists 22 federal disaster declarations that included Aroostook County since 1970, not counting 2 for COVID-19; the latest is EM-3598-ME (Hurricane Lee, declared 14 September 2023). Another 3 Maine declarations were made statewide without a county list.
How many tornadoes have hit Aroostook County?
NOAA's Storm Prediction Center recorded 30 tornadoes touching Aroostook County from 1950 to 2025. The deadliest: 11 Aug 1954, F2, 1 mi path, 1 killed, 1 injured (deaths and injuries are for the whole path).
Is the National Risk Index a flood zone map?
No. The National Risk Index is a planning-level estimate for a whole county, built for nationwide comparison. It does not tell you the flood zone or the risk of a single property: for that, look up the address on FEMA's Flood Map Service Center (msc.fema.gov) and ask your local floodplain manager.