Oregon cold wave risk
Clackamas County has the highest cold wave risk in Oregon, scoring 95.2 out of 100 — rated "Relatively High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Clackamas County | 95.2 | Relatively High |
| 2 | Umatilla County | 94.4 | Relatively High |
| 3 | Multnomah County | 91 | Relatively High |
| 4 | Washington County | 90.1 | Relatively High |
| 5 | Union County | 83.6 | Relatively Moderate |
| 6 | Klamath County | 68.9 | Relatively Moderate |
| 7 | Deschutes County | 66.3 | Relatively Moderate |
| 8 | Marion County | 52 | Relatively Low |
| 9 | Lane County | 44 | Relatively Low |
| 10 | Wasco County | 43.1 | Relatively Low |
| 11 | Wallowa County | 37.1 | Relatively Low |
| 12 | Linn County | 33.4 | Relatively Low |
| 13 | Hood River County | 33.2 | Relatively Low |
| 14 | Morrow County | 31.9 | Relatively Low |
| 15 | Jefferson County | 31.2 | Relatively Low |
| 16 | Columbia County | 30.8 | Relatively Low |
| 17 | Crook County | 24.1 | Relatively Low |
| 18 | Yamhill County | 21.7 | Very Low |
| 19 | Clatsop County | 20.4 | Very Low |
| 20 | Baker County | 17 | Very Low |
| 21 | Benton County | 15.5 | Very Low |
| 22 | Polk County | 15.2 | Very Low |
| 23 | Grant County | 14.5 | Very Low |
| 24 | Lincoln County | 14 | Very Low |
| 25 | Tillamook County | 12.7 | Very Low |
| 26 | Lake County | 11.8 | Very Low |
| 27 | Gilliam County | 10.4 | Very Low |
| 28 | Malheur County | 10.4 | Very Low |
| 29 | Sherman County | 9.9 | Very Low |
| 30 | Jackson County | 8.7 | Very Low |
| 31 | Wheeler County | 6 | Very Low |
| 32 | Douglas County | 3.3 | Very Low |
| 33 | Josephine County | 3.3 | Very Low |
| 34 | Harney County | 2.5 | Very Low |
| 35 | Coos County | 0 | No Rating |
| 36 | Curry County | 0 | No Rating |
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.
Cold Wave risk nationally:
Other hazard risks in Oregon:
Frequently asked questions
What is the highest cold wave risk county in Oregon?
Clackamas County, OR has the highest cold wave risk in Oregon, with a FEMA National Risk Index score of 95.2 out of 100 (rated "Relatively High").
What causes cold wave risk in Oregon?
Cold wave risk captures expected losses from extended periods of extreme cold, including wind chill. The northern Plains, Great Lakes, and interior New England see the most severe and frequent cold events. Cold extremes cause significant excess mortality, especially among unhoused populations, the elderly, and those with inadequate heating or insulation. Cold and wind chill events are reported at forecast-zone level in NOAA Storm Events and are not included in county-level counts.