Flooding in Portland

Program
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.

Featured content

Graphic says: Be prepared in many languages and shows a clipboard with items checked off.

How to Prepare if You Live or Work in a Floodplain

Graphic says: Be informed. Stay safe. Graphic shows icons for don't walk and don't drive in flood waters.

Flood Safety

landslide on burnside

Landslides, Flooding, and Sandbags

Johnson Creek Flood Gauge

Hourly Rainfall Data: City of Portland HYDRA Rainfall Network

FEMA Flood Maps

Flood Safe Columbia River

Report a Sewer Problem

Flood Hazard Regulations and Flood Maps

A large flooding body of water digging up the ground next to a house

About the Floodplain Resilience Plan

Raking leaves PBOT

Adopt a storm drain

Photo shows an open space holding flood water with dry winter grasses and split-rail fencing

Remapping the 100-year Floodplain for Johnson Creek

Contact

Floodplain Remapping

floodinfo@portlandoregon.govFor questions regarding floodplain remapping and insurance
phone number503-823-4591

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

Related offices, programs, advisory groups, and projects

Photo shows people walking in the rain with umbrellas with bikes and rain planters along the sidewalk.

Managing Stormwater

Photo shows two workers in sewer construction vault lowering pipe into place

Sewer and Stormwater Improvements

Willamette River high banks

Floodplain Resilience Plan

Aerial view of bridges over the Willamette River in Downtown Portland

Environmental Services

City inspector visiting a building site

Development Services

Portland Emergency Coordination Center

Emergency Management

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