I was in a Category 1 in Bermuda 2 years ago, the airport was open within 36 hours, though it took AA an additional two days (after the airport was open) to get aircraft back on the island.
They claimed it was due to weather, but that was just a lame excuse given to the ticket office.
It was awesome, clear, sunny skies and I was forced to enjoy the beach for another 2 days, even though other airlines were already operating.
Who knows what excuses they will come up for their scheduling issues...