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Matt Slocum, Associated Press
A couple make their way through a snow storm, Tuesday, Jan. 11, 2011, in Philadelphia.

NEW YORK — Up and down the East Coast, armies of emergency workers with plows and salt spreaders are hitting the streets as the snowstorm that caused mayhem in the South moved into the region, dumping more than a foot in some areas overnight.

New York City says its public school system will remain open despite the snow, but schools were shut elsewhere, including Philadelphia, Boston and most of Connecticut.

New York City public schools have only closed six times since 1978.

School Chancellor Cathie Black made the announcement at 5 a.m. Wednesday. But she says all field trips planned for the day will be canceled.

Snow started falling late Tuesday. It's stopped in Philadelphia but is still coming down in New England and New York City. By 4 a.m. Wednesday, 8.8 inches had fallen on Central Park.