MSY is operational with one runway open, daylight, visual approaches only. The terminal building is essentially a makeshift hospital at this point. Many of the carriers have been flying in 1-2 flights a day with charter flight numbers over the last several days. No jetways are useable.
Baton Rouge (BTR) is 70 miles away and most carriers have added mainline aircraft service to that airport. Formerly, many of the flights into BTR were with CRJs and EMBs . BTR will be THE main New Orleans passenger airport over the next several weeks with MSY expected to be used for relief flights.
The situation is severe and the retospective analysis will be going on for months.