I would be willing to say the infield tunnel is flooded. I can take a drive around the grounds sometimes in the next few days to say for sure. If the pits are flooded, they will just move the pits to other parking areas like they did for a SC race once. Parking maybe a pain in some areas, but flooding from creeks or river is no concern there. The construction for the Chik Fil A is in the corner away from the main parking area (it is where the drag strip parking was).