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.

Portions of western Washington state have experienced a month’s worth of rain within the past few days, causing historic flooding, damaging mudslides and more than 100,00 people facing potential evacuations.

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.

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.

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

Flood-stricken towns in Washington state brace for potential levee failures - Nation and World News | Hawaii Tribune-Herald

An arctic air blast is plunging south from Canada, spreading into the northern United States. Meanwhile, residents of the Pacific Northwest are bracing for possible mudslides and levee failures as floodwaters slowly recede.