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

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

SKAGIT COUNTY — The sun set Thursday over the soggy and worried people of Western Washington while the fast-running Skagit River, full of sediment and debris, swelled.

The atmospheric river is forecast to move over Washington starting on Monday and will last until Tuesday, bringing heavy rain and gusty winds. This comes days after a historic river flood impacted the state,

The Skagit River crested at 41.1 feet in Concrete early Thursday and 37.73 feet in Mount Vernon early Friday, flooding communities throughout the valley.

Six rivers around Western Washington could see record flooding this week, as a second round of an intense storm rolls in from the Pacific.

“Due to the rising water levels in the Snohomish river adjacent to the shelter, the Everett Animal Shelter is at significant risk of flooding,” Everett Animal Shelter in Everett, Washington said. “Out of an abundance of caution, we will be initiating a temporary evacuation of the animals to ensure their safety and well-being.”

Skagit County Emergency Management is asking anyone who lives in the 100-year floodplain to be prepared for an evacuation notice within the next 24 hours.

Unprecedented flooding is driving tens of thousands of people from their homes. Local authorities are sharing resources, and the state is asking for federal aid.