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People gather on Washington Street in front of Manhattan Bridge during a snowfall, Sunday, Dec. 14, 2025, in the Brooklyn Borough of New York. (AP Photo/Adam Gray)

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A father pulls his children, Sebastian Ingham (5) and Lucas Ingham (1), on a sled during a snowfall, Sunday, Dec. 14, 2025, in the Brooklyn Borough of New York. (AP Photo/Adam Gray)

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A couple embrace during a snow in front of the Manhattan bridge, Sunday, Dec. 14, 2025, in the Brooklyn Borough of New York. (AP Photo/Adam Gray)

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Two people sled in the snow next to the Brooklyn-Queens Expressway, Sunday, Dec. 14, 2025, in the Brooklyn Borough of New York. (AP Photo/Adam Gray)

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A person walks during falling snow, Sunday, Dec. 14, 2025, in the Brooklyn Borough of New York. (AP Photo/Adam Gray)

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. Thousands of people have been evacuated. In the nation's heartland, big cities like Chicago and Minneapolis are preparing for dangerous wind chills. On Saturday, Grand Forks, North Dakota, it felt like minus 36 degrees. The cold air mass is pushing south and east, with winter advisories as far as Alabama and Georgia.