SKAGIT COUNTY — The sun set Thursday over the soggy and worried people of Western Washington while the fast-running Skagit River, full of sediment and debris, swelled.

A century-old Skagit River dike is holding as 75,000 residents remain under evacuation orders. Officials warn flood risks will continue into Saturday morning.

The Burlington Police Department and Skagit County Emergency management issued a city-wide evacuation this morning, after initial reports that the Slough, part of the Skagit River watershed, has jumped its banks. The City has nearly 10,000 residents.

Drier weather is coming, but flooding effects are likely to continue for days across portions of western Washington state and northwestern Oregon.

Communities along the Skagit River, from Sedro Woolley to Mount Vernon, are on high alert as two atmospheric rivers threaten major flooding.Mount Vernon's Mayo

The Skagit River is predicted to crest at more than 47 feet near the town of Concrete, north of Seattle, 15 inches above the threshold for a major flooding event.

Major flooding is expected in Skagit County from Wednesday afternoon through Friday evening. According to a news release from the county Department of Emergency Management, the Skagit River is forecast to crest at 40.

A Flash Flood Watch is in effect for the Skagit River through Friday due to the possibility of its dikes/levees failing, which could lead to widespread flooding.

Authorities are going door-to-door in South Prairie, Washington, in Pierce County, urging residents to leave their homes immediately as water rises there. The Pierce County Sheriff’s Office previously said that at least 25 people have been rescued in the county since Wednesday, including in South Prairie.