bizzare leakage on rear passenger floor

[pipedream]

hey guys-

well its winter here in oregon which means.... rain. and lots of it. usually i park in a garage, but when im at work, my car sits out on the street all day soaking up the rain.

the floor matts undernear the driver seat more towards the rear passenger floor space is completely soaked through with water. I'm not talking a little bit, but I mean it is literally soaked through. There is no apparent leak from the ceiling or anywhere else, it appears as if its actually coming up THROUGH the floor somehow. Does this mean there is a hole in the bottom of my car? I did a quick initial expection and didn't see anything very unusual- of course, its kind of hard to really examine the undercarriage when its soaked just from normal driving through puddles and water.

I guess I was wondering if anyone else has experienced a leakage problem similar like this, and of course, what solution they arrived at.. if any.

thanks guys..
-Eric