I heard a large jet takeoff around this time. I was sitting on the tarmac in DL29. We had been sitting for around 5 hours at this point, and I considered this quite unusual.
The takeoff around 1830 was the only unusual thing I saw/heard. It was a large ac takeoff sound.
We arrived around 1300, pilot announced during taxi that power was out and we parked. I did nap for an hour or two and might have missed other takeoffs.
Cell coverage was horrible. I was sending text updates to family and trying to lurk here but signal was horrible and pages would take forever to load/timeout.
When we finally got word that power was partially restored to Terminal F, we taxied over and I took this picture from y seat. You can see the lights in the terminal but the control tower windows appear dark; could be normal or not. Pic related taken at 1944 ATL time.