Natural Hazard Risk in New Hampshire
The risk score (0–100) combines expected annual loss from 18 natural hazards with social vulnerability and community resilience. Higher = greater relative risk. Scores compare counties across the United States.
See what's happening right now on the live map →| County | Risk score | Rating | Expected annual loss | Population |
|---|---|---|---|---|
| Hillsborough | 89.8 | Relatively Moderate | $120.3M | 422,867 |
| Rockingham | 85.8 | Relatively Moderate | $89.8M | 314,137 |
| Grafton | 81.8 | Relatively Moderate | $50.4M | 91,072 |
| Merrimack | 78.2 | Relatively Low | $48.8M | 153,727 |
| Coos | 72.8 | Relatively Low | $27M | 31,248 |
| Carroll | 71 | Relatively Low | $31M | 50,016 |
| Strafford | 64.1 | Relatively Low | $29.1M | 130,861 |
| Cheshire | 60.5 | Relatively Low | $27.3M | 76,445 |
| Belknap | 57.4 | Relatively Low | $23.9M | 63,653 |
| Sullivan | 37.6 | Very Low | $15M | 43,048 |
🏛️ Federal disaster declarations (last 2 years)
DRSEVERE STORM AND FLOODINGAug 20, 2024
Severe Storm · Designated areas: Coos (County), Grafton (County)
Major disaster (DR) and emergency (EM) declarations unlock federal assistance for the designated areas. Source: FEMA / OpenFEMA.
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Data: FEMA National Risk Index (updated ~annually). AlertAtlas is not an official warning service — always follow local authorities.