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

The floodwall in Mount Vernon is expected to be overtopped as the river swells. Authorities have told everyone within the river's 100-year floodplain to evacuate.

The urgency went up a notch in Mount Vernon Thursday night, amidst concerns about whether the levees and dikes will be able to hold a record crest.

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.

National Guard troops went door-to-door early Friday to evacuate a farming city north of Seattle as severe flooding throughout Western Washington stranded families on rooftops, washed over bridges and ripped homes from their foundations.

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.

The Skagit River has flooded the Riverwalk in downtown Mount Vernon, forcing thousands across Skagit County to evacuate their homes.

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.

An Omen? You best start believing in ghost stories, Washington State Ferries. You're in one. An unlit "ghost boat" drifted through the Washington State Ferries' Mukilteo docking as a ferry was coming in. Nobody was hurt by the wayward vessel.

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

Mount Vernon Mayor Peter Donovan says the city is as prepared as possible for a potentially historic Skagit River flood, with downtown floodwalls deployed and Level 3 evacuation orders in place.