(CNN) — A power outage at Atlanta’s Hartsfield-Jackson International Airport, the world’s busiest airport, is leaving thousands of passengers stranded and planes grounded indefinitely.
The Federal Aviation Administration issued a ground stop for flights to Atlanta at 11:30 a.m. ET Sunday, meaning that planes are being held at their departure airports, according to a tweet on the airport’s verified Twitter account.
The FAA has set a ground stop for flights into #ATL due to the outage. A ground stop means flights to ATL are held at departure airports.
— Atlanta Airport (@ATLairport) December 17, 2017
Hartsfield-Jackson handles 2,500 flights and an average of 275,000 passengers daily, according to its website. Because of its size the outage could have a ripple effect on air traffic both domestically and overseas.
Georgia Power has confirmed they have crews in the field working to determine the cause of the problem. The outage affects all airport operations, spokesman Reese McCranie said. The airport is currently working with Georgia Power to figure out the cause of the outage, he said.
Atlanta is the largest hub for Delta Air Lines, which told passengers to check the status of their flights.
“Delta is aware of a power outage at the Atlanta Airport affecting airport concourses and terminal buildings,” spokesman Michael Thomas told CNN. “Flight disruptions are expected as a result and Delta customers are encouraged check the status of their flight via the Fly Delta Mobile App or Delta.com. More updates to follow.”
Brittny Dettro said she was waiting to board a flight from Atlanta to Milwaukee when the power went out in Terminal B early Sunday afternoon. She shot this image at 1:10 p.m. ET.
“When the power goes out in one of the world’s biggest airports… yikes! This is crazy ATL!!” she wrote in a Facebook post.