Duke Energy says about 7,000 customers in Moore County, North Carolina, got power back overnight after someone shot critical equipment at two substations over the weekend.
But Duke spokesman Jeff Brooks said 38,000 customers were still without power as of Monday morning.
"We could see some more customers coming on in the next day or so. But the vast majority will need until about Wednesday or Thursday, to be restored due to the repairs that we're having to do and the equipment we have to replace," Brooks said.
Brooks says extensive damage to the Moore County substations is slowing repairs.
"Some of that equipment could be repaired, or at least (is) in the process of being repaired. Other equipment was damaged to the point that it needed to be replaced. And that is where some of the challenges have come, in just, you know, the scale of work that has to be done there," he said.
The FBI and State Bureau of Investigation have joined the Moore County Sheriff's Office in trying to find who is responsible.