After being forced out of their homes for two days, residents of Andover, North Andover, and Lawrence, Massachusetts, were told they could return to their homes Sunday morning, but were warned not to turn their gas back on at this time. Governor Charlie Baker said homes throughout the areas impacted by the blasts were cleared of gas by 6:30 a.m. Sunday. The evacuation was prompted by three spontaneous explosions that caused fire or other damage to about 80 homes.
NBC News reports that the source of the explosions was initially unknown, but has now been identified. The pipelines that set off the explosions belong to Columbia Gas of Massachusetts. The National Transportation Safety Board is conducting an investigation into the series of events that led to the dangerous situation including their record-keeping practices and its daily operations. An examination of recent consumer complaints will also be conducted.