Auto body repair & detailing: leaky buick century, rust holes, seam sealer

Question
I have a 92 Buick Century which takes on water any time it rains. I'm not sure of the source of the leak, whether it is the gaps between door panels or somewhere along the bottom of the car. When the car is drying out after being flooded though, I can see water dripping from a couple places underneath the car. Is this dripping a potential source of the leak or are there holes in the bottom panels of the car designed specifically to shed water on the floor of the car when it does flood somehow? How can I tell.
Thanks,

Luke

Answer
Sit in the car while someone sprays the car with a garden hose. watch for any water that may come into the car. It runs out the floor because it has been leaking for a while and more than likely has rust holes in the floor. once you find the leak get some seam sealer and apply when the car is dry.
         Thank you for the question !
         Ken