A National Grid substation near Wood River Junction in Richmond cut power for two hours this morning to 20,000 customers accross South Kingstown, Hopkinton, Charlestown, Richmond, and Westerly.
No one was injured in the explosion that occurred today at 9:15 a.m., but the substation will be closed indefinitely until crews can identify the cause of the problem and make necessary repairs, said Charlotte McCormack, a National Grid spokeswoman.
"Right now we are not anticipating any further loss of power as we look into it," said McCormack.
Power lines for customers who depended on the failed substation have been diverted through other power grids.
Alarms were ringing all over town this morning, said Union Fire District Chief Robert Perry.
"We experienced a power surge which set off a number of alarms in town when generators burnt out," said Perry.
He said no buildings in South Kingstown were damaged.