Flooding in Portland

Portland’s location on the Columbia and Willamette rivers and the many waterways within the city mean that flooding can happen here. Find out how to prepare and be safe, where Portland’s floodplains are, and what the City is doing for flood prevention.
Photo shows a neighborhood street and a mailbox surrounded by water.



Floodplain Remapping

floodinfo@portlandoregon.govFor questions regarding floodplain remapping and insurance

Construction and Development in a Floodplain

Bureau of Development Services
phone number503-823-7300For questions regarding zoning, regulations, and building codes that limit where and how development can occur in a floodplain or natural area