More than 1,000 flights have been cancelled after Atlanta's Hartsfield-Jackson airport suffered an 11-hour power cut.
Hartsfield-Jackson, which is the busiest airport for passenger traffic in the world, had to stop operations on Sunday (December 17) after its terminals lost power.
The incident forced the FAA to issue a “ground stop” for flights heading to Atlanta - domestic US services to the airport had to be held at departure airports while international flights were diverted to other US airports.
Power was eventually restored at Hartsfield-Jackson late on Sunday evening but delays and cancellations will continue into Monday (December 18).
Delta, which is based in Atlanta, had to cancel 900 flights on Sunday with a further 300 cancellations on Monday.
“Most of the 300 cancellations Monday are early morning, inbound flights to Atlanta to give the operation there an opportunity to more quickly return to normal,” said the airline in a statement.
“Delta’s flight schedule in Atlanta is expected to return to normal by Monday afternoon. Throughout the outage, Delta people at every level have been engaged to ensure customers are taken care of.”
The power cut is believed to have been caused by a fire in a underground electrical facility at the airport.