I’m sure the electric company knows the “root cause” of the outage already but they’re being careful about what they say publicly right now. It sounds like a third party contractor dug up major feeders into the airport.
There is probably a lot of finger-pointing going on right now: by the utility, the contractor, whoever did the blue staking, etc. I’m sure the utility’s Risk Management (claims) representatives and attorneys are already involved.
https://pbs.twimg.com/media/DRSZZ-7WsAAGslk.jpg:small
This is the press release from Georgia Power a few minutes ago. It seems there is/was an extensive underground fire.