US weather: Snowstorm causes 50-car pileup as America prepares for Arctic blast

More than 50 cars crashed on a strip of Ohio freeway in the middle of a snowstorm as the US braces for severe weather and hundreds of record-breaking, below-freezing temperatures overnight.Whiteout conditions across the northeast and midwest caused several accidents, some deadly, as an Arctic blast of frigid weather moves eastward. Many roads and schools have closed and thousands of flights were cancelled or delayed as millions of Americans prepare for an early winter blast of Arctic air.

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