An arctic air blast is plunging south from Canada, spreading into the northern United States. Meanwhile, residents of the Pacific Northwest are bracing for possible mudslides and levee failures as floodwaters slowly recede.

"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.

Record river flooding is ongoing in parts of Washington State, but following a drier weekend, a new worry for wetter weather will arise early in the week ahead.

Flood alerts are in effect across the Pacific Northwest as a second wave of heavy rain from an atmospheric river pushes into the region. Western Washington is already experiencing major river flooding,

Heavy rain​ has triggered flooding, rescues and road closures in Washington state, with Gov. Bob Ferguson declaring a statewide emergency​.

An executive order aims to tackle state regulation on artificial intelligence. An Obamacare exodus occurs before premium hikes. And, major flooding in the Pacific Northwest. President Donald Trump signed an executive order that seeks to limit states' ability to regulate artificial intelligence and upend existing laws in some of them.

Spruce Hill Winery, a family-owned operation that specializes in producing small-batch wines sourced from the Pacific Northwest, will open a tasting room in Gig Harbor in mid-January.

The Pacific Northwest is expected to see up to seven inches of rain this week, as the eastern United States braces for arctic cold.