More than 60% of US faces winter weather warnings, with temperatures drastically below normal in many places

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Street lights and snow blow in severe wind gusts in Flint, Michigan.
A wild winter storm enveloped much of the US on Saturday, bringing blizzards, freezing rain, flooding and intense cold close to record lows. More than a dozen deaths were attributed to the storm. Holiday travel and utilities were disrupted, with around 1.4 million homes and businesses left without power by late afternoon.
Forecasters said the storm, a "bomb cyclone" or "bombogenesis", was caused by a collision of cold, dry air from the north and warm, moist air from the south.
More than 200 million people were under some form of winter advisory or warning in "one of the greatest extents of winter weather warnings and advisories ever", the National Weather Service (NWS) said.
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