Arctic Air Pushes into US, Threatening Storms Across Country

Ice, snow, cold, cold weather

An enormous, brutal mass of arctic air is shoving south over most of the United States — threatening 32 million people for the rest of the week with snow, ice, wind and extraordinary drops in the temperature.

Some of the country's biggest cities are being hit: Ice threatens to knock out power in Dallas, Denver could get almost a foot of snow, and Chicago could plunge from the mid-50s on Wednesday to the low teens by Friday night.