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

While the torrential downpour caused by an atmospheric river has slowed down, rivers and waterways continue to rise and flood in the state.

"Stay home and don't travel unless necessary," the sheriff's office urged. The Coast Guard said it rescued people from a flooded home in Sumas, along the Washington-Canada border, after the water forced the residents into their attic.

"The flooding levels we're looking at are potentially historic in nature," Gov. Bob Ferguson said Thursday afternoon, urging people to listen to official advice and follow evacuation orders.

Washington is under a state of emergency and evacuation orders are in place for tens of thousands of residents. Gov. Bob Ferguson on Thursday urged everyone to follow evacuation instructions as yet another river neared record levels.

Rivers continued rising to the north and east of Seattle after record rains washed out highways and prompted evacuation warnings for more than 100,000 people.

Swollen rivers led to floods in numerous counties and evacuation notices for several cities, though some have been rescinded. Most of the rivers’ levels crested between Wednesday night and early Friday morning and while some didn’t beat previous records, most were close.

On Friday at 7:01 p.m. a flood warning was released by the National Weather Service in effect until further notice for Clackamas and Marion counties.

An atmospheric river event has been slamming the Pacific Northwest with rain, and the flood threat is far from over.