Water in trunk after heavy rain

Yeah.... that sounds like pretty much the same thing I'm going to have to do as well. Still haven't positively found the source of the leak, but apart from tearing out the whole back seat and rummaging around upside down in there I don't know what to do.

I am fortunate to have covered storage/parking, but when it comes to driving in the rain, I get inches of water in the trunk splashing around all over the place. Of course, it's worse now that I've patched up the rust holes in the trunk. I have strategically placed sponges soaking up the worst of the water, but that gets mighty cold on the hands squeezing them out once they're saturated...

Thank you for your response, Patrick's74Custom. : )