FEMA Flood Zone Lookup in Oregon

Oregon faces flood risk from the Willamette, Columbia, Rogue, Umpqua, and Deschutes rivers, as well as coastal flooding along the Pacific coastline. The Willamette Valley through Portland, Salem, Eugene, and Corvallis is the state's primary flood-prone corridor, with the Willamette River regularly reaching flood stage during winter rain and snowmelt events. The Columbus Day Storm of 1962 and the 1996 floods caused significant damage throughout the valley. Portland sits at the confluence of the Willamette and Columbia rivers and faces flood risk from both waterways. The Columbia River creates extensive flood risk for communities along its length including The Dalles, Hood River, and Astoria. Coastal communities from Astoria to Brookings face storm surge and tidal flooding, with the 2022 king tides causing significant coastal inundation. The Rogue River valley in southern Oregon including Medford and Grants Pass experiences regular flooding. The state has over 200 NFIP-participating communities. Oregon's wet winter climate and mountainous terrain create concentrated runoff events that can cause rapid river rises. Climate change is expected to increase winter rainfall intensity and coastal flood frequency across the state.