Natural Hazard Risk in Massachusetts
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 |
|---|---|---|---|---|
| Middlesex | 96.9 | Relatively High | $321.9M | 1,629,857 |
| Essex | 95.6 | Relatively High | $198.8M | 808,897 |
| Worcester | 93.5 | Relatively Moderate | $162.8M | 861,566 |
| Suffolk | 93.5 | Relatively Moderate | $114.9M | 796,326 |
| Hampden | 92.8 | Relatively Moderate | $106.7M | 465,327 |
| Norfolk | 92 | Relatively Moderate | $146.9M | 725,648 |
| Plymouth | 90.4 | Relatively Moderate | $114.3M | 530,320 |
| Bristol | 89.9 | Relatively Moderate | $87.3M | 578,698 |
| Barnstable | 89.1 | Relatively Moderate | $82.3M | 228,870 |
| Berkshire | 84 | Relatively Moderate | $51.8M | 128,939 |
| Hampshire | 69.9 | Relatively Low | $37.3M | 162,053 |
| Franklin | 60.7 | Relatively Low | $22.9M | 70,685 |
| Nantucket | 38.7 | Very Low | $22.9M | 14,255 |
| Dukes | 16.8 | Very Low | $7.3M | 20,495 |
🏛️ Federal disaster declarations (last 2 years)
DRSEVERE WINTER STORM AND SNOWSTORMJun 30, 2026
Winter Storm · Designated areas: Mashpee Wampanoag Tribe
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.