MONROE, Wash. -- A blast of arctic air swept south from Canada and spread into parts of the northern U.S., while residents of the Pacific Northwest braced for possible mudslides and levee failures from floodwaters that are expected to be slow to recede.

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.

As the Pacific Northwest braces for more rainfall, one Central Valley woman is already on the ground helping those in need. Fresno resident Deborah Blaze has been on 17 different deployments with the American Red Cross Central Valley chapter.

A levee was breached on the rising Green River early Monday afternoon, just east of Seattle-Tacoma International Airport in western Washington, as another atmospheric river dumps rain over the Pacific Northwest.

Following a very wet pattern last week, AccuWeather meteorologists warn that additional rain in the Northwest this week that will heighten the risk of widespread flooding.

Record rainfall prompted evacuation orders for about 100,000 people as the Skagit River north of Seattle is forecast to crest almost two feet (0.6 meter) above its historic record Thursday evening.