By Steven Schauer, Deputy Executive Director
On World Rivers Day (September 22), we are reminded of the vital role rivers play in our communities, our environment, and our lives. This global celebration highlights the importance of our waterways and encourages everyone to commit to their stewardship. For King County residents, rivers are the lifeblood of our natural ecosystems, rural communities, and urban landscapes. The King County Flood Control District (KCFCD) uses World Rivers Day as a crucial reminder to prepare for the upcoming flood season.
The Importance of Rivers in King County
King County is home to an intricate network of river systems that connect the Cascade Mountains to Puget Sound. Major rivers like the Cedar, Duwamish, Green, Snoqualmie, South Fork Skykomish, and White rivers, together with their tributaries, flow through a diverse range of landscapes — forested areas, agricultural lands, rural communities, and densely populated urban centers. Each of these river systems plays a crucial role in sustaining local ecosystems, supporting agriculture, and providing water resources for the communities they traverse.
However, these rivers also pose a significant risk of flooding. Historically, King County has experienced flooding during every month except August, leading to 13 federally declared disasters since 1990. The greatest risk of flooding typically occurs during flood season from October to April. The KCFCD is dedicated to reducing the risk of river flooding and protecting both people and property throughout the region.
King County’s Major Rivers
Cedar River: The Cedar River Basin includes the Sammamish River and Issaquah Creek, and flows through northeast King County, supporting both forested and urban environments.
Duwamish River: Once a wide, meandering waterway, the Duwamish River has been significantly altered by human activities. The Duwamish River begins at the confluence of the Green and Black rivers in Tukwila and flows past the South Seattle neighborhoods of Georgetown and South Park, through Seattle’s industrial core, under the West Seattle Bridge and then empties into Elliott Bay.
Green River: Stretches across the southern part of King County, flowing through the cities of Auburn, Kent, Renton, and Tukwila before reaching Seattle. The Green River is crucial for public safety, the regional economy, and protecting critical infrastructure.
Snoqualmie River: The Lower Snoqualmie River is fed by the Raging, Tolt, and Upper Snoqualmie rivers – the Upper Snoqualmie River includes the North, Middle, and South Forks. Located in the northeast part of King County, the Snoqualmie River Valley supports forestry, rural residential, agricultural, and recreational land uses.
South Fork Skykomish River: Formed at the confluence of the Tye and Foss Rivers about 13 river miles upstream of the King and Snohomish county line, the South Fork Skykomish River is a relatively unpolluted and free-flowing river that feeds the Snohomish River, which empties into Puget Sound at Port Gardner in Everett. The State of Washington has designated many portions of the South Fork Skykomish as scenic.
White River: Forms part of the boundary between King and Pierce counties. The White River runs through several communities and tribal lands, eventually merging with the Puyallup River.
Be Flood Ready: Preparing for the Flood Season
With flood season fast approaching, King County communities are encouraged to take proactive steps to prepare. The KCFCD has made substantial investments in flood risk reduction, maintaining over 500 flood protection facilities along 118 miles of riverbanks. These efforts include updating floodplain maps, conducting technical studies, and enhancing flood warning systems to keep residents informed and safe.
Each year, in collaboration with King County, we publish the Be Flood Ready Brochure. It’s packed with information to help you prepare and respond to flooding. Brochures are mailed to area residents and are available on our Be Flood Ready Brochure webpage in 23 languages. Please take the time to read through it to gain valuable insights and practical tips that can enhance the safety of you and those around you.
In addition to reviewing the Be Flood Ready Brochure, these additional tips will help you get ready for flood season:
- Understand Your Flood Risk: Familiarize yourself with the floodplains in your area and be aware of the specific risks posed by nearby rivers.
- Obtain Flood Insurance: Protect your property by purchasing flood insurance if you live in a flood-prone area.
- Stay Informed: Sign up for King County’s personalized flood alerts. These alerts can be received by phone, text, email, or via the new Flood Warning App, which provides real-time data and forecasts in multiple languages.
- Have a Plan: Prepare an emergency plan that includes evacuation routes, a communication strategy, and a supply kit.
Join Us in Celebrating and Protecting Area Rivers
World Rivers Day is a celebration and call to action! As we enjoy the beauty and benefits of our rivers, let’s commit to their protection. By being flood-ready and supporting the KCFCD’s efforts, we can ensure our rivers continue to sustain our communities and ecosystems for generations to come.
Together, let’s embrace World Rivers Day by safeguarding our rivers and preparing for the challenges they bring.
Find more flood resources here.