Oregon ice storm risk
Umatilla County has the highest ice storm risk in Oregon, scoring 93.4 out of 100 — rated "Relatively High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Umatilla County | 93.4 | Relatively High |
| 2 | Multnomah County | 91.8 | Relatively High |
| 3 | Washington County | 91.4 | Relatively High |
| 4 | Clackamas County | 90.9 | Relatively High |
| 5 | Lincoln County | 86.9 | Relatively High |
| 6 | Hood River County | 84.5 | Relatively High |
| 7 | Wasco County | 84.2 | Relatively High |
| 8 | Lane County | 83.2 | Relatively High |
| 9 | Morrow County | 78.3 | Relatively Moderate |
| 10 | Douglas County | 76.1 | Relatively Moderate |
| 11 | Marion County | 73.6 | Relatively Moderate |
| 12 | Yamhill County | 68.7 | Relatively Moderate |
| 13 | Polk County | 64.5 | Relatively Moderate |
| 14 | Benton County | 56.5 | Relatively Low |
| 15 | Deschutes County | 54.8 | Relatively Low |
| 16 | Linn County | 53.8 | Relatively Low |
| 17 | Sherman County | 53.1 | Relatively Low |
| 18 | Union County | 49.8 | Relatively Low |
| 19 | Tillamook County | 46.2 | Relatively Low |
| 20 | Clatsop County | 41.8 | Relatively Low |
| 21 | Columbia County | 38.8 | Relatively Low |
| 22 | Wallowa County | 31.4 | Relatively Low |
| 23 | Klamath County | 21 | Very Low |
| 24 | Jefferson County | 19.8 | Very Low |
| 25 | Baker County | 19.7 | Very Low |
| 26 | Crook County | 19.4 | Very Low |
| 27 | Jackson County | 19.2 | Very Low |
| 28 | Malheur County | 15.5 | Very Low |
| 29 | Grant County | 15.3 | Very Low |
| 30 | Gilliam County | 13 | Very Low |
| 31 | Josephine County | 13 | Very Low |
| 32 | Coos County | 12.8 | Very Low |
| 33 | Lake County | 9.5 | Very Low |
| 34 | Harney County | 7.3 | Very Low |
| 35 | Curry County | 4.9 | Very Low |
| 36 | Wheeler County | 2.3 | 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 Oregon:
Frequently asked questions
What is the highest ice storm risk county in Oregon?
Umatilla County, OR has the highest ice storm risk in Oregon, with a FEMA National Risk Index score of 93.4 out of 100 (rated "Relatively High").
What causes ice storm risk in Oregon?
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.