( CNN ) -- The freak snowstorm that pounded the eastern United States late last week , cutting power to hundreds of thousands of people , killed at least 22 people , officials said Thursday . In Massachusetts , at least six deaths were related to the storm , and a seventh was under investigation , said Peter William Judge , public information officer for the Massachusetts Emergency Management Agency . Four of the deaths were linked to carbon monoxide poisoning ; one person was electrocuted by a downed power line and one person died in a house fire blamed on the storm , he said . In New Jersey , eight storm-related fatalities were tallied , including three people who burned to death in house fires , one person who died when a branch fell on him , another who died when a tree fell on him , and three people who died in motor vehicle accidents . A ninth death was under investigation . In Connecticut , eight people died , four of them from carbon monoxide poisoning , said Gov . Dannel Malloy . In all , 91 shelters and 111 warming centers were to be open in the state Thursday night , he said . An estimated 831,000 customers lost electricity during Saturday 's storm , according to Connecticut Light & Power officials and the attorney general 's office . The storm dropped at least a foot of snow in a band from West Virginia to Maine . By Thursday afternoon , power had been restored to slightly more than half of the affected customers , said Dave Radanovich , a CL & P spokesman . He predicted power would be fully restored by Monday morning . The utility -- using workers from 20 states -- deployed 867 line crews composed of two or three workers each to repair downed transmission lines ; another 628 tree crews and 550 support crews were aiding the effort , Radanovich said . President Barack Obama has signed emergency declarations for New Hampshire and Connecticut , clearing the way for federal aid to supplement state and local response efforts . Connecticut 's attorney general called Thursday for regulators to investigate CL & P , the state 's main electric utility , over its handling of the storm . Attorney General George Jepsen filed the request with the state 's Public Utilities Regulatory Authority , which is already investigating CL & P over its response to power outages during Tropical Storm Irene in September . `` The heavy , wet snow weighed down on the trees , '' Radanovich said . `` Limbs were holding two times their normal weight , '' because the state 's trees still have leaves on them . In addition , CL & P had less time to prepare for Saturday 's storm by bringing in out-of-state crews ahead of time , according to Radanovich , since the storm hit with little notice . `` Forecasts for this storm initially predicted only 6 inches of snow , but on Friday that jumped to a foot , '' he said . CNN 's Andy Rose , Dan Verello , Hussein Saddique and Logan Burruss contributed to this report .
NEW : 6 storm-related deaths in Massachusetts . NEW : 2 people killed by falling trees and power lines across the state of New York, including a man who was electrocuted while trying to fix his car on Monday morning. An estimated 831,000 CL & P customers lost power during Saturday 's storm . Governor : 4 of the 8 Connecticut deaths were from carbon monoxide poisoning .