Hermiston, OR
Local storm history & FEMA National Risk Index data
Hermiston is rated Relatively Moderate for overall natural hazard risk — near the middle compared to other US counties — based on FEMA's National Risk Index for Umatilla County, OR. The county's highest-rated hazards are wildfire, cold wave, and ice storm.
Storm events near Hermiston
NOAA-recorded tornado, hail, and flood events within 25 miles of Hermiston's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Hermiston itself, not the whole county.
County-wide hazard risk
Every other hazard FEMA and NOAA track — including drought — is only scored at the county level. These are Umatilla County's FEMA National Risk Index scores, covering Hermiston along with the rest of the county, not a Hermiston-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 96.2 | Relatively Moderate |
| Inland Flooding | 81.5 | Relatively Moderate |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 87.2 | Relatively Low |
| Heat Wave | 86.6 | Relatively Moderate |
| Tornado | 13 | Very Low |
| Avalanche | 76.3 | Relatively Low |
| Cold Wave | 94.4 | Relatively High |
| Drought | 82.8 | Relatively Moderate |
| Hail | 52 | Relatively Low |
| Hurricane | — | Not Applicable |
| Ice Storm | 93.4 | Relatively High |
| Landslide | 90.3 | Relatively Moderate |
| Lightning | 55.2 | Relatively Low |
| Strong Wind | 83.3 | Relatively Moderate |
| Tsunami | — | Not Applicable |
| Volcanic Activity | 72 | Very Low |
| Winter Weather | 89.6 | Relatively High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Umatilla County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Umatilla County:
More on Umatilla County:
Frequently asked questions
What natural hazards is Hermiston, OR at risk of?
Hermiston is rated Relatively Moderate for overall natural hazard risk by FEMA's National Risk Index — near the middle compared to other US counties. The highest-rated hazards for Umatilla County, where Hermiston is located, are wildfire, cold wave, and ice storm.
What is Hermiston's biggest natural hazard risk?
Wildfire is the highest-rated hazard for Umatilla County, where Hermiston is located, scoring 96.2 out of 100 on FEMA's National Risk Index (rated "Relatively Moderate").
Is Hermiston a high-risk area for natural disasters?
Somewhat — Hermiston carries near the middle compared to other US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively Moderate" for Umatilla County.
Has Hermiston had tornadoes, hail, or flooding?
NOAA has recorded 1 tornado, 4 hail, 3 inland flooding events within 25 miles of Hermiston since 2016.