UPDATE: Delta Air Lines has said it is beginning to re-start flights after it was forced to make large-scale cancellations this morning as a result of a power outage in Atlanta.
The US airline first issued a warning at 5am (eastern seaboard) this morning warning that flights would be delayed.
In its latest update, it warned of continuing delays and cancellations while operations begin to get back underway: "A Delta ground stop has been lifted and limited departures are resuming following a power outage in Atlanta that impacted Delta computer systems and operations worldwide. Cancellations and delays continue.
"Customers heading to the airport should expect delays and cancellations. While inquiries are high and wait times are long, our customer service agents are doing everything they can to assist.
"There may also be some lag time in the display of accurate flight status at delta.com, the Fly Delta App and from Delta representatives on the phone and in airport."
