Atlanta airport outage: Terrorism, inside threat not ruled out, FBI says

However, signs of the outage remain among stacks of unclaimed baggage and stranded passengers sleeping on the floors.

Georgia Power officials said the equipment that manages electric sources into the airport failed, sparking a fire that spurred the outage.

More than 1,500 flights were canceled between Sunday and Monday. And while remaining passengers are hoping to fly out Tuesday, some won’t make it out until Wednesday, according to Channel 2 Action News.

Six flights were canceled Tuesday, and 15 others were delayed.

One passenger, Rashaad Brennen, was originally rebooked onto one of more than 400 flights canceled Monday, but now he may have to wait another 48 hours, he told the news station.

“When I got here, they told me my initial flight was pushed back until Wednesday,” Brennan said.

He is on standby for a flight home to Philadelphia, Channel 2 reported.

“I just want to go home,” Brennen said. “Just really want to go home.”

Passenger Eva Huff was offered a refund and may fly out later this afternoon.

“Horrible,” Huff said. “Nightmare. I have been stuck here all night. They changed my flight maybe four times. Never come back to Atlanta.”

Officials with Georgia Power are investigating what caused the fire in the underground tunnel.

They know what happened, but not why at this point.