Nevada ice storm risk
Washoe County has the highest ice storm risk in Nevada, scoring 80.7 out of 100 — rated "Relatively Moderate" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Washoe County | 80.7 | Relatively Moderate |
| 2 | Lyon County | 34.3 | Relatively Low |
| 3 | Churchill County | 26 | Very Low |
| 4 | Pershing County | 15.4 | 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 Nevada:
Frequently asked questions
What is the highest ice storm risk county in Nevada?
Washoe County, NV has the highest ice storm risk in Nevada, with a FEMA National Risk Index score of 80.7 out of 100 (rated "Relatively Moderate").
What causes ice storm risk in Nevada?
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.