why do my 2010 toyota camry floors be wet

I can think of maybe two things it could be. One question though? Does the wetness have the odor of antifreeze? If so it could be the heater core leaking. The other thing is if it is just wet and has no smell it sounds like the condensation drain going out of the air conditioning unit could be clogged and the water is collecting inside of the AC assembly under the dash and is slowly seeping out and down into your carpet under the dash. Hope those help you out.

There are three possibilities. A heater leak, AC condensation leak and weather stripping letting in rain water. Since the bad floor is wet I suspect rain.