hollin

I have a 2000 RX300 and after a very heavy rain, both the driver side and passenger side floor hane a half inch of water. I am not sure where the leak is at and why it is both areas. I thought it would be the seal on the car door, so I made sure any place that was loose, I glued down with gorilla glue, but it did not help. Can I fix this myself or do I need to take it to a shop? Thanks, any help is appreciated. Hollin