" mudslide came down on a house on SR 530 near Oso on Saturday morning. There was no immediate word on injuries or fatalities.
The slide has blocked a portion of the Stillaguamish River and there is concern that it will give way.
Just after 2 p.m., the National Weather Service said the North Fork Stillaguamish River gauge downstream of the slide showed a 2.2-foot drop in an hour, confirming the river is blocked by slide.
Geologists have been called out to determine how stable the area is.
Fire and rescue, the Snohomish County Sheriff's Office and the Washington State Patrol are on the scene.
The Department of Transportation said the slide is between milepost 37 and 38 near 310th Street NE and is estimated to be a mile long.
The commander of the Snohomish County Search & Rescue team says it's the largest slide he's seen in the area in 30 years.
It's not yet known how many people are impacted by the slide.
Officials say SR 530 will be closed at least a week. Traffic is being diverted at Whitman Road, which is on the west side of the slide.
Drivers should avoid the area until further notice. "
This area has long been unstable with a history of sliding.
Home everyone is ok.
Slide was on the up river side of skagland hill. Went through the bus turnaround. Sounds like the engineered part of the hill held up but the mud and debris from up above just found another way down.
Just talked to a friend that lives above hazel. West bound traffic is being stopped at french creek. Cell towers up there must be jammed with calls so phone coverage is very hit and miss. Landline service isn't working up there.