Lake Oswego, OR
Local storm history & FEMA National Risk Index data
Lake Oswego is rated Relatively High for overall natural hazard risk — higher risk than most US counties — based on FEMA's National Risk Index for Clackamas County, OR. The county's highest-rated hazards are earthquake, landslide, and volcanic activity.
Storm events near Lake Oswego
NOAA-recorded tornado, hail, and flood events within 25 miles of Lake Oswego's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Lake Oswego 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 Clackamas County's FEMA National Risk Index scores, covering Lake Oswego along with the rest of the county, not a Lake Oswego-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 86.8 | Relatively Low |
| Inland Flooding | 93.7 | Relatively High |
| Coastal Flooding | 18.8 | Very Low |
| Earthquake | 98.6 | Relatively High |
| Heat Wave | 95.5 | Relatively Moderate |
| Tornado | 38.1 | Relatively Low |
| Avalanche | 86.5 | Relatively High |
| Cold Wave | 95.2 | Relatively High |
| Drought | 14.1 | Very Low |
| Hail | 31.6 | Very Low |
| Hurricane | — | Not Applicable |
| Ice Storm | 90.9 | Relatively High |
| Landslide | 95.8 | Relatively Moderate |
| Lightning | 83.2 | Relatively High |
| Strong Wind | 93.4 | Relatively High |
| Tsunami | — | Not Applicable |
| Volcanic Activity | 95.8 | Relatively Moderate |
| Winter Weather | 85.4 | Relatively High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Clackamas County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Clackamas County:
More on Clackamas County:
Frequently asked questions
What natural hazards is Lake Oswego, OR at risk of?
Lake Oswego is rated Relatively High for overall natural hazard risk by FEMA's National Risk Index — higher risk than most US counties. The highest-rated hazards for Clackamas County, where Lake Oswego is located, are earthquake, landslide, and volcanic activity.
What is Lake Oswego's biggest natural hazard risk?
Earthquake is the highest-rated hazard for Clackamas County, where Lake Oswego is located, scoring 98.6 out of 100 on FEMA's National Risk Index (rated "Relatively High").
Is Lake Oswego a high-risk area for natural disasters?
Yes — Lake Oswego carries higher risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively High" for Clackamas County.
Has Lake Oswego had tornadoes, hail, or flooding?
NOAA has recorded 9 tornado, 4 hail, 30 inland flooding events within 25 miles of Lake Oswego since 2016.