Customers should check the status of their flight before heading to the airport while the issue is being addressed. — Delta News Hub (@DeltaNewsHub) August 8, 2016

Update: According to Delta, a power outage in the middle of the night threw its systems into disarray. The issue is ongoing, and the airline anticipates "large-scale cancellations" today.

Update 2: Delta has made at least some progress towards resolving its computer problems. The airline has lifted the ground stop and a limited number of flights are beginning to get off the ground. Passengers can still expect heavy delays or cancellations, and a travel waiver is in effect.

Update 3: Delta released the following statement about the outage, CNBC reports: