New York ice storm risk
Nassau County has the highest ice storm risk in New York, scoring 98.7 out of 100 — rated "Very High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Nassau County | 98.7 | Very High |
| 2 | Onondaga County | 96.9 | Very High |
| 3 | Suffolk County | 96.5 | Very High |
| 4 | Erie County | 93.7 | Relatively High |
| 5 | Kings County | 93.4 | Relatively High |
| 6 | Queens County | 91.4 | Relatively High |
| 7 | Oneida County | 91 | Relatively High |
| 8 | Westchester County | 90.3 | Relatively High |
| 9 | Monroe County | 89 | Relatively High |
| 10 | New York County | 88.8 | Relatively High |
| 11 | Niagara County | 87.4 | Relatively High |
| 12 | St. Lawrence County | 87.3 | Relatively High |
| 13 | Bronx County | 86.9 | Relatively High |
| 14 | Cayuga County | 86.7 | Relatively High |
| 15 | Albany County | 86 | Relatively High |
| 16 | Clinton County | 83.9 | Relatively High |
| 17 | Oswego County | 83.9 | Relatively High |
| 18 | Jefferson County | 81.5 | Relatively Moderate |
| 19 | Franklin County | 80.3 | Relatively Moderate |
| 20 | Saratoga County | 78.8 | Relatively Moderate |
| 21 | Rockland County | 78 | Relatively Moderate |
| 22 | Ontario County | 77.1 | Relatively Moderate |
| 23 | Orange County | 76.8 | Relatively Moderate |
| 24 | Schenectady County | 76.6 | Relatively Moderate |
| 25 | Dutchess County | 75.6 | Relatively Moderate |
| 26 | Essex County | 75.3 | Relatively Moderate |
| 27 | Genesee County | 74.6 | Relatively Moderate |
| 28 | Wayne County | 74.5 | Relatively Moderate |
| 29 | Broome County | 74.4 | Relatively Moderate |
| 30 | Lewis County | 73.6 | Relatively Moderate |
| 31 | Ulster County | 72.8 | Relatively Moderate |
| 32 | Madison County | 70.9 | Relatively Moderate |
| 33 | Rensselaer County | 70.7 | Relatively Moderate |
| 34 | Seneca County | 69.4 | Relatively Moderate |
| 35 | Columbia County | 69.1 | Relatively Moderate |
| 36 | Putnam County | 68.3 | Relatively Moderate |
| 37 | Chautauqua County | 66.7 | Relatively Moderate |
| 38 | Herkimer County | 66.2 | Relatively Moderate |
| 39 | Richmond County | 65.8 | Relatively Moderate |
| 40 | Livingston County | 64.7 | Relatively Moderate |
| 41 | Orleans County | 63.1 | Relatively Moderate |
| 42 | Tompkins County | 62.4 | Relatively Moderate |
| 43 | Yates County | 62.2 | Relatively Moderate |
| 44 | Fulton County | 61.6 | Relatively Moderate |
| 45 | Chenango County | 60 | Relatively Low |
| 46 | Cortland County | 58.6 | Relatively Low |
| 47 | Washington County | 57.5 | Relatively Low |
| 48 | Wyoming County | 57.2 | Relatively Low |
| 49 | Montgomery County | 57 | Relatively Low |
| 50 | Greene County | 54.9 | Relatively Low |
| 51 | Schuyler County | 54.5 | Relatively Low |
| 52 | Warren County | 54.3 | Relatively Low |
| 53 | Sullivan County | 53.3 | Relatively Low |
| 54 | Cattaraugus County | 50 | Relatively Low |
| 55 | Tioga County | 49.7 | Relatively Low |
| 56 | Steuben County | 47 | Relatively Low |
| 57 | Otsego County | 45 | Relatively Low |
| 58 | Delaware County | 42.3 | Relatively Low |
| 59 | Chemung County | 37.7 | Relatively Low |
| 60 | Schoharie County | 36 | Relatively Low |
| 61 | Allegany County | 34.7 | Relatively Low |
| 62 | Hamilton County | 13.9 | 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 New York:
Frequently asked questions
What is the highest ice storm risk county in New York?
Nassau County, NY has the highest ice storm risk in New York, with a FEMA National Risk Index score of 98.7 out of 100 (rated "Very High").
How many counties in New York are rated Very High for ice storm risk?
3 of 62 scored New York counties are rated "Very High" for ice storm risk by FEMA's National Risk Index.
What causes ice storm risk in New York?
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.