Flooding caused by heavy rain chased residents from their homes in one Pacific Northwest community and killed an unknown number of dairy cattle, and three people were missing Wednesday after a mudslide on the Canadian side of the border.

Flood warnings remained in effect Wednesday for several rivers in northwestern Washington, the National Weather Service said.

Most highways remained open but numerous local roads were closed by high water in King, Snohomish and Skagit counties.

An emergency shelter for evacuees was opened in Hamilton, along the Skagit River, said Don McKeehen, a Skagit County emergency operations spokesman. A Red Cross official estimated more than 75 people checked in Tuesday.

Northeast of Seattle, an unknown number of dairy cattle were lost Tuesday in when a flood-control structure failed near the town of Snohomish.

"The cattle were floating by here like wood debris," former dairy farmer John Misich said. "There was a steady stream of them floating by."