Arctic air sweeps into Upper Midwest as Pacific Northwest braces after severe flooding

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Catastrophic flooding in the Pacific Northwest has forced thousands to evacuate, with residents now facing potential mudslides and levee failures as floodwaters recede slowly.

More rain and wind expected as early as late Sunday threaten additional flooding and tree damage from saturated ground in the Pacific Northwest.

Arctic air from Canada is sweeping south, bringing dangerous wind chills to the Midwest and spreading toward the Deep South by Sunday.

MONROE, Wash. — A blast of arctic air swept south from Canada and spread into parts of the northern U.S. on Saturday, while residents of the Pacific Northwest braced for possible mudslides and levee failures from floodwaters that a