WE have just finished a drought, and got LOTS of rain. Our 1983 Volvo turned up with soaking wet floor mats and carpets for the front seat--both sides. My son drives this car, and didn't notice anything out of the ordinary last night, but today when driving to work found the floors soaked. The headliner is bone dry; the door panels show no sign of water; the seats are completely dry; the trunk is dry; the body just inside the door (where the bottom of the door overlaps the body) is so dry it is still dusty. I don't see any defects in the body panels or the floor board panels. My son does admit he may have driven through some moderately high water, but obviously it wasn't high enough to interfere with engine operation. My only theory is that he got in some water that was deep enough to get to some panel on the undercarriage, where water got pulled in and then soaked the carpet from below. Does anyone out there have any competing theories? Is this a sign of some rusted-out panel somewhere?