Vermont ice storm risk
Chittenden County has the highest ice storm risk in Vermont, scoring 78.1 out of 100 — rated "Relatively Moderate" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Chittenden County | 78.1 | Relatively Moderate |
| 2 | Windham County | 72.2 | Relatively Moderate |
| 3 | Windsor County | 70.5 | Relatively Moderate |
| 4 | Franklin County | 66.8 | Relatively Moderate |
| 5 | Rutland County | 62.3 | Relatively Moderate |
| 6 | Addison County | 52.8 | Relatively Low |
| 7 | Washington County | 50.6 | Relatively Low |
| 8 | Bennington County | 50.4 | Relatively Low |
| 9 | Orleans County | 49 | Relatively Low |
| 10 | Caledonia County | 48 | Relatively Low |
| 11 | Lamoille County | 39.9 | Relatively Low |
| 12 | Orange County | 39.9 | Relatively Low |
| 13 | Grand Isle County | 34.7 | Relatively Low |
| 14 | Essex County | 20.4 | Very Low |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Ice Storm risk nationally:
Other hazard risks in Vermont:
Frequently asked questions
What is the highest ice storm risk county in Vermont?
Chittenden County, VT has the highest ice storm risk in Vermont, with a FEMA National Risk Index score of 78.1 out of 100 (rated "Relatively Moderate").
What causes ice storm risk in Vermont?
Ice storm risk covers damaging freezing rain and sleet accumulation, which collapses power lines, trees, and structures. The highest-risk counties cluster in a band from eastern Texas and Arkansas through the Carolinas and New England, where warm Gulf moisture overruns cold arctic air most frequently. Ice storms cause catastrophic and long-lasting power outages. Ice storm and sleet events are reported at forecast-zone level in NOAA Storm Events and are not included in county-level counts.