NEW YORK (AFP) - A ferocious snowstorm pummeled the northeastern United States for a second straight day on Saturday, shutting down schools, severing power lines and forcing planes, cars and trains to come to a standstill.
The storm was forecast to bring the heaviest snow so far this winter along the New England coast, threatening power and transport links for tens of millions of people.
By late Friday, New York, one of the world's busiest air travel hubs, was cut off from the skies as snow and wind led airlines to suspend all operations at LaGuardia, Newark Liberty and John F. Kennedy International airports.
In Massachusetts alone, more than 255,000 homes and businesses were without power by late evening and the number was expected to rise, the Boston Herald reported.
A gust of 119 kilometers per hour winds was reported on Nantucket Island.
LaGuardia general manager Tom Bosco told NY1 television that the airport was "battling" the storm and would strive to remain open even after the airlines shut down for the night.
He estimated that if a foot (30 centimeters) of snow fell - the worst-case scenario forecast for New York - flights would resume "probably by mid-morning."
The heaviest impact of the storm was expected overnight in and around Boston, and Governor Deval Patrick temporarily ordered all normal traffic off Massachusetts roads, with the threat of up to a year in jail for violators.
"There are a number of exemptions for... emergency workers and the like.
Please exercise caution and use common sense," Mr Patrick said at his emergency center in Framingham.
In Connecticut, Governor Dannel Malloy issued a "ban on motor vehicle travel on limited access highways" to free up emergency services traffic and suspended commuter train service between New York and New Haven, Connecticut.
Rhode Island, where some of America's most exclusive summer homes are located, also instituted driving restrictions.
In addition to the road and air snarl-ups, the rail service Amtrak said trains from New York northbound and also southbound to the capital Washington were being suspended.