POWER

THE HEADACHE caused by a massive power outage at Hartsfield-Jackson Atlanta International Airport over the weekend spilled into Monday as officials reconsidered the power setup at one of the country’s busiest airports.

Full service on Delta Air Lines was restored by the afternoon, and the majority of customers were rebooked on other flights after hours of travel chaos, the airline said.

Delta was the airline hardest hit by the outage, which began about 1 p.m. on Sunday and plunged the airport into a powerless state for hours. Energy was restored just after midnight, after thousands were stranded in terminals and in planes on runways, authorities said.

Hartsfield-Jackson is Delta’s biggest hub, and the airline accounted for 900 of the 1,100 flights canceled after the power went out.

Georgia Power CEO Paul Bowers told The Associated Press on Monday that the utility is still trying to figure out what caused the failure, which disrupted power feeds at two substations.

“We don’t know what caused the failure, but we do know the failure caused the fire and the fire is what really disrupted the service at the airport,” he said.

The blaze began in a service tunnel that serves the concourses at the airport, Bowers said in a Georgia Power video.

While it’s too early to say how the power supply will be changed, officials are examining isolating the switch gear in concrete to slow any future fires. They can also separate power sources for each concourse, Bowers said.

Investigators will spend the rest of the week looking at the cause of the fire. “We will fix . . . cable this week and have all the service back to normal operations by the end of the week,” Bowers said on “Good Morning America” on Monday.

Thousands of passengers stranded in the airport were treated to food from Chick-fil-A.

The fast-food restaurant, normally closed on Sunday, opened up to feed hungry fliers.

The airport had resumed full service, including its SkyTrain, by Monday afternoon.

Hotels around Atlanta offered discounted rates or waived fees for passengers still stranded by the mayhem.