Hillsborough County, New Hampshire: hazard risk
FEMA rates Hillsborough County's overall risk Relatively Moderate (score 89.8 of 100, higher than 89% of rated U.S. counties); 4 of its 15 hazards are rated Relatively High or Very High, led by ice storm, lightning, winter weather. Its storm record holds 864 events since 1950.
FEMA's rating for each hazard
These are FEMA's county-wide model ratings and this county's storm record. They are not an assessment of any property, address or building, and not insurance advice: a property's risk depends on its own elevation, construction and location.
FEMA gives each hazard its own rating, and a rating does not follow the score from one hazard to the next: a hazard with a higher score can carry a lower rating than another. The table sorts by FEMA's rating, then by score (0 to 100, the county against every other county for that hazard).
| Hazard | Risk rating | Score | Expected annual loss |
|---|---|---|---|
| Ice Storm | Very High | 95.4 | $2.5M |
| Lightning | Relatively High | 93.2 | $2.2M |
| Winter Weather | Relatively High | 87.4 | $486K |
| Strong Wind | Relatively High | 86.9 | $2.5M |
| Riverine Flooding | Relatively Moderate | 92.6 | $76M |
| Hurricane | Relatively Moderate | 92.6 | $18M |
| Tornado | Relatively Moderate | 82.6 | $6.5M |
| Cold Wave | Relatively Moderate | 66.2 | $2.6M |
| Earthquake | Relatively Low | 88.2 | $5.8M |
| Landslide | Relatively Low | 84.2 | $39K |
| Heat Wave | Relatively Low | 75.4 | $1.7M |
| Wildfire | Relatively Low | 67.0 | $204K |
| Drought | Relatively Low | 57.9 | $357K |
| Hail | Relatively Low | 55.4 | $473K |
| Avalanche | Very Low | 15.2 | $28 |
Source: FEMA National Risk Index, December 2025 release. A model of future loss, not a count of past events. FEMA's National Risk Index map.
What the record holds
| Hazard | Records | Deaths | Damage | Rank in state | Rank in U.S. |
|---|---|---|---|---|---|
| Severe thunderstorm wind | 274 | 1 | $1.9M | 5th of 10 | 1722nd of 3,080 |
| Winter storms | 243 | 2 | $48M | 8th of 10 | 735th of 3,077 |
| Hail | 111 | 0 | $16K | 4th of 10 | 1940th of 3,080 |
| Floods | 95 | 0 | $9.1M | 7th of 10 | 1301st of 3,080 |
| High wind and dust storms | 59 | 4 | $6.7M | 6th of 10 | 701st of 3,080 |
| Lightning | 24 | 0 | $2.0M | 4th of 10 | 279th of 3,080 |
| Drought | 21 | 0 | $12M | 7th of 10 | 1854th of 3,063 |
| Tornadoes | 19 | 0 | $8.0M | 3rd of 10 | 2053rd of 3,080 |
| Extreme cold | 5 | 0 | – | 10th of 10 | 2477th of 3,076 |
| Heat | 5 | 0 | – | 3rd of 10 | 1918th of 3,076 |
| Heavy rain | 5 | 0 | – | 2nd of 10 | 1258th of 3,080 |
| Hurricanes and tropical storms | 3 | 0 | $20K | 5th of 10 | 894th of 1,849 |
Source: NOAA NCEI Storm Events Database, 1950 to 2026-06-30; damage in 2025 dollars. Search the record at NCEI.
The full Hillsborough County record: every hazard by year and month, the deadliest events and FEMA's declarations.