Nearly 22 inches of snow fell in Boston and up to 3 feet was expected, the National Weather Service said, threatening the city's 2003 record of 27.6 inches. In the heavily Catholic city, the archdiocese urged parishioners to be prudent and reminded them that, under church law, the requirement to attend Sunday Mass "does not apply when there is grave difficulty in fulfilling this obligation." Early snowfall was blamed for a 19-car pileup Friday in Cumberland, Maine, that caused minor injuries. In New York, hundreds of cars got stuck on the Long Island Expressway on Friday, and dozens remained disabled early Saturday as police worked to free them. About 650,000 customers in the Northeast lost power during the height of the snowstorm, most of them in Massachusetts and Rhode Island. The Pilgrim Nuclear Power Plant in Plymouth, Mass., lost electricity and shut down Friday night during the storm. Authorities say there's no threat to public safety. At least four deaths were being blamed on the storm, three in Canada and one in New York. In southern Ontario, an 80-year-old woman collapsed while shoveling her driveway and two men were killed in car crashes. In New York, a 74-year-old man died after being struck by a car in Poughkeepsie; the driver said she lost control in the snowy conditions, police said. Forecasters said wind gusts exceeding 75 mph could cause more widespread power outages and whip the snow into fearsome drifts. Flooding was expected along coastal areas still recovering from Superstorm Sandy, which hit New York and New Jersey the hardest and is considered Jersey's worst natural disaster. In Manhattan, streets normally bustling after midnight, were quiet Saturday but for the hum of snow blowers, the scrape of shovels and the laughter from late night revelers who braved the snow. Bill Tavonallo, 39, said he walked home on purpose from a Manhattan bar to enjoy the snow falling. "With Sandy, we were scared. But this is wonderful," he said, his glasses crusted with ice. "It's nice to have a reason to slow down." In Massachusetts, Gov. Deval Patrick enacted a statewide driving ban for the first time since the Blizzard of '78, a ferocious storm that dropped 27 inches of snow, packed hurricane-force winds and claimed dozens of lives.