Leak in pasenger footwell on 1997 Toyota Camry

After it rains there is water built up on the floor of the passenger side footwell. I suspect it is coming from a plugged windshield drain which is backing up the water to an opening in the firewall. Anyone have experience with fixing this problem?

Asked by for the 1997 Toyota Camry
Do you notice moisture anywhere else, like coming from the top or the side.

Easy check would be to open the hood to see if there are any debris built up and clean it up.
2 more answers
does it have sun roof there drain tubs on front or back carry to body shop they may be can fix it
sun roof drain is clogged take a air condensed can and clean the drain hose