The MBTA's... (Associated Press) 
 
 A man heads out to clear snow as it falls again, Monday, Feb. 11, 2013 in Concord, N.H. After digging out from two feet of snow over the weekend more snow arrived on Monday. (AP Photo/Craig Ruttle) (Associated Press) 
 
 Many schools remained closed across New England and New York, and nearly 140,000 homes and businesses were still waiting for the electricity to come back on following the epic storm that swept in on Friday and Saturday with up to 3 feet of snow, claiming at least 15 lives in the U.S. and Canada. Massachusetts and other states from New York to Maine are preparing for a major blizzard with possible record amounts of snowfall in some areas. North begins recovery 
 
 In the Northeast, the heavy snow that fell over the weekend was still causing problems Monday. Scott Devico, a spokesman for the Connecticut Department of Emergency Management, said Monday the roofs of 16 homes and buildings had collapsed because of the weight of the snow piled atop them. "The devastation we have seen here would lead one to believe that it'll be days before we get power back," said Jim Cantwell, a state representative for the Massachusetts towns of Marshfield and Scituate, where about 90% of customers were without power late Sunday. In Boston, two people died Saturday after being overcome by carbon monoxide while sitting in running cars, including a teenager who went into the family car to stay warm while his father shoveled. Rain and higher temperatures in the forecast for Monday could help melt the mess but also put extra weight on snow-covered roofs, leading to collapses. The mix made for a messy Monday morning commute into cities such as Boston, though schools remained closed there and in many other locales as the snow clean-up effort continued. Flights resumed Sunday at Boston's Logan Airport and Amtrak restored limited service. "We're working as hard as we can," Rhode Island Gov. "There's a ton of snow, and there's nowhere to put it," said Lena Berc of Boston, where 24.9 inches fell. The streets around the small school were still a mess, but they were no longer closed.
– While the Northeast digs itself out from under historic snowfall, a major storm hit the Upper Midwest today with 8 to 15 inches of snow, CNN reports. The new snowstorm struck seven states but targeted Minnesota and the Dakotas in particular. Meanwhile, heavy rain drenched much of the Southeast, prompting flood watches from central Georgia to southeastern Louisiana up to tomorrow afternoon. In other storm news: At least 15 tornadoes appeared in southern Alabama and Mississippi yesterday. One wreaked havoc in Hattiesburg, Miss., injuring at least 13 and striking a main street. Nearly 140,000 still lack power in New England and New York, where many schools are still closed, the AP reports. Crews have cleared most major highways, but many secondary roads remain unusable under ice and snow. In hard-hit Bridgeport, Conn., about 10% to 20% of the 30-inch snowfall has been plowed, says Mayor Bill Finch. And Bridgeport is not alone: "I've talked to other mayors; we're all buried," he says. A new concern: roof collapses as warmer daytime temperatures soothe Massachusetts, Rhode Island, and Connecticut. Connecticut Gov. Dannel Malloy reported several cases of buildings caving in. What's more, rain will lay the groundwork for frozen roads when temperatures fall below freezing overnight. Click for more from the AP or CNN.