— Governor Roy Cooper declared a state of emergency Thursday evening due to a major power outage on Hatteras Island in Dare County and Ocracoke Island in Hyde County.

A construction company acknowledged earlier Thursday that it caused a power outage across two islands on North Carolina's Outer Banks, leaving tourists stranded without air conditioning or places to eat.

The Cape Hatteras Electric Cooperative said in a news release that PCL Construction told the utility it had driven a steel casing into an electric transmission cable while working on the new Bonner Bridge on the state's coast, inadvertently cutting off power to Ocracoke and Hatteras islands.

CHEC says it is working to assess the extent of the damage and plan for the repair. Spokeswoman Laura Ertle said Roanoke, Virginia-based New River Electrical Corp., which erected the cable on the original Bonner Bridge in 1995, is coming to the coast to dig up the cable to assess the damage.

"Did PCL just nick one of the cables? Is it worse than that?" Ertle said. "Once they get here and put eyes on it, then we'll have a really better sense of what we're looking at in terms of repair time."

If the necessary materials are on hand, repairs could take several days, Ertle said. If the items are not available locally, repairs could take weeks.

The power went out around 4:30 a.m. Thursday. Officials said about 9,000 customers are without power on the two islands — about 7,700 on Hatteras and another 1,300 on Ocracoke.

At about 5 p.m., all non-residents were mandated to leave Ocracoke Island. Although there is no official deadline for them to leave, officials asked all visitors make an effort to evacuate the island by noon on Friday.

The North Carolina Department of Transportation Ferry Division is assisting with visitor evacuation.

CHEC said power is currently available for Buxton, Frisco and part of Hatteras Village through a diesel generating plant. The cooperative said it would also initiate rolling blackouts, but only if people turn off air conditioning units and minimize other electrical usage. Ten portable generators are also being brought in, Ertle said.

The outage comes during peak tourist season, which runs from mid-June through Labor Day.

"This is July. We’re going to lose steam. It’s going to have its effect in the fall when all of this catches up,” said ice cream shop owner BJ Oelschlegal. "It's depressing. It's like having a hurricane."

Erica Plouffe Lazure was visiting Ocracoke from Exeter, New Hampshire, with a friend, but had to cut her trip short and head north to Elizabeth City. She said two restaurants on Ocracoke are using generators to stay open, but the hotel she booked for her stay closed after its generator exploded minutes after it was started.

"There's a lot of hot, sweaty people here," Lazure said, adding that she tried to book a motel further up the North Carolina coast, only to find they were either sold out or asking as much as $500 a night.

"This is a beautiful island and I waited two years to come back here because it's one of my favorite places in the world," she said. "I'm a little bummed that the power has gotten in the way, but, 'til next time."

Ertle sympathized with people inconvenienced by the outage.

"We know that people are spending a lot of money to come down here and they look forward to their vacation on Hatteras Island every year," she said. "We know that they're getting frustrated, but we just really appreciate their patience."

While tourists have been asked to leave, some have decided to stay and brave the hot temperatures.

"We're going to stay all weekend and try to ride it out. Hopefully it will come back on this weekend," Turner Butler said.