The U.S. East Coast from Philadelphia to New York City to Maine braced on Monday for a potentially historic blizzard that forecasters say could dump up to 3 feet (90 cm) of snow on the region and snarl transportation for tens of millions of people.

The National Weather Service issued a blizzard warning for the northern section of the East Coast from Monday afternoon, putting states from New Jersey to Indiana under winter storm watches and advisories until Tuesday. Airlines canceled nearly 1,800 flights.

"This could be the biggest snowstorm in the history of this city," New York Mayor Bill de Blasio told a news conference on Sunday afternoon, saying the snowfall could reach up to 3 feet.