BURLINGTON, Washington, Dec 12 (Reuters) - Residents and emergency crews in towns along the rain-engorged Skagit River in western Washington state braced on Friday for potential levee failures while National Guard troops assisted in evacuations after days of severe flooding in the Pacific Northwest.

Washington is prone to intense spells of fall rainfall, but these storms have been exceptional, and more rain is on the way this weekend.

Record floodwaters are slowly receding in Washington state after triggering evacuations, inundating communities and prompting dramatic rescues from rooftops and vehicles

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.

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

Rebecca Davenport is based in Salem, but has been supervising shelters in Northwest Washington in the aftermath of the floods.

Days of torrential rain in western Washington caused historic floods that stranded families on rooftops, washed over bridges, and damaged homes.All of the riv

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