An arctic deep freeze that has led to a historic winter storm in the US has killed at least 60 people, an NBC News tally shows. The chills were spread as far as the Mexican border.

'Once-in-a-lifetime' weather disaster leaves at least 60 dead in US

Blizzard warnings were in effect in parts of Connecticut, Massachusetts and upstate New York, but were lifted for New York City

Winter Storm Stella hits US Northeast, thousands of flights cancelled

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'Once-in-a-lifetime' weather disaster leaves at least 60 dead in US

Winter Storm Stella hits US Northeast, thousands of flights cancelled