I gave the car only a brief inspection but one thing I did check for was a drain hole. There was no hole that I could see, either from the inside or underneath. I will check the areas for leaks as mentioned by one80 (and thank you for the links to those threads). I will also check to see why the fender well had no water in it, only the inboard trunk well. Maybe the fender well has a drain hole.

As an aside, did you know the mid-mounted fuel tank is protected by a 1/4 inch thick cast magnesium plate? When I first saw it I thought it was just another form fitted interior panel. Its a very impressive hunk of metal, held in by bolts around its perimeter, apparently designed to stop an intrusion and maybe also to add stiffness to the bulkhead. It looks like a skid plate from under a 4 wheel drive pickup truck, except more expensive.