Heat Wave Risk in Oregon
All Oregon counties ranked by FEMA National Risk Index heat wave score
Heat Wave risk — prolonged periods of extreme heat that threaten health and infrastructure — is rated for 36 of 36 Oregon counties in FEMA's National Risk Index. Multnomah County carries the state's highest heat wave score at 96.8, with $10M in expected annual heat wave losses.
2 Oregon counties are rated High or Very High for heat wave, and expected annual losses from heat wave total roughly $71M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Heat Wave
| # | County | Heat Wave Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Multnomah County | High | 6.34 / yr | $10M | |
| 2 | Washington County | High | 6.25 / yr | $11M | |
| 3 | Marion County | Medium | 5.62 / yr | $7M | |
| 4 | Clackamas County | Medium | 4.92 / yr | $8M | |
| 5 | Jackson County | Medium | 6.45 / yr | $6M | |
| 6 | Lane County | Medium | 4.49 / yr | $5M | |
| 7 | Columbia County | Medium | 4.90 / yr | $4M | |
| 8 | Josephine County | Medium | 7.99 / yr | $2M | |
| 9 | Yamhill County | Medium | 6.14 / yr | $3M | |
| 10 | Douglas County | Medium | 4.44 / yr | $2M | |
| 11 | Polk County | Medium | 6.12 / yr | $3M | |
| 12 | Umatilla County | Medium | 4.84 / yr | $2M | |
| 13 | Linn County | Medium | 5.05 / yr | $2M | |
| 14 | Benton County | Medium | 5.88 / yr | $2M | |
| 15 | Klamath County | Low | 3.18 / yr | $771K | |
| 16 | Malheur County | Low | 3.61 / yr | $527K | |
| 17 | Deschutes County | Low | 2.41 / yr | $539K | |
| 18 | Morrow County | Low | 5.10 / yr | $405K | |
| 19 | Coos County | Low | 2.36 / yr | $305K | |
| 20 | Union County | Low | 2.53 / yr | $276K | |
| 21 | Hood River County | Low | 3.95 / yr | $435K | |
| 22 | Wasco County | Low | 3.50 / yr | $280K | |
| 23 | Clatsop County | Low | 3.42 / yr | $209K | |
| 24 | Curry County | Low | 5.53 / yr | $171K | |
| 25 | Baker County | Low | 3.27 / yr | $185K | |
| 26 | Lincoln County | Very Low | 3.53 / yr | $147K | |
| 27 | Tillamook County | Very Low | 3.46 / yr | $135K | |
| 28 | Grant County | Very Low | 2.91 / yr | $93K | |
| 29 | Harney County | Very Low | 2.90 / yr | $79K | |
| 30 | Lake County | Very Low | 2.64 / yr | $77K | |
| 31 | Wallowa County | Very Low | 2.25 / yr | $57K | |
| 32 | Crook County | Very Low | 2.52 / yr | $70K | |
| 33 | Jefferson County | Very Low | 3.14 / yr | $77K | |
| 34 | Gilliam County | Very Low | 4.97 / yr | $23K | |
| 35 | Sherman County | Very Low | 3.82 / yr | $12K | |
| 36 | Wheeler County | Very Low | 3.17 / yr | $7K |
36 Oregon counties with measurable heat wave risk. See the national heat wave ranking or all Oregon counties by overall risk.
Frequently Asked Questions
Which Oregon county has the highest heat wave risk?
Multnomah County has the highest FEMA heat wave risk score in Oregon at 96.8 (High), with $10M in expected annual losses and about 6.34 events per year.
How many Oregon counties face significant heat wave risk?
36 Oregon counties record measurable heat wave risk in FEMA's National Risk Index; 2 of them are rated High or Very High.