On arriving tonight (NZ460) it was announced that parts of the roof had caved in and there was water in places, so to be careful. Only flooding inside the building I saw was a collapsed ceiling tile just by the escalators down to the exit into the main terminal.

There was some bad surface flooding on the road between the express parking and the normal parking area, just prior to the roundabout. It will have been 10-20cm or so deep. My taxi driver said that earlier it was well up his car door.