When it rains, water fills up my '04 Durango doors. All of them except for the drivers side one. My carpets are wet and smell moldy and when I'm driving it sounds like I'm on a boat with all the sloshing water. Why is this happening and how do I stop it?

 

Look at the bottom of the doors and see if the drain holes are stopped up.

 

Is the headliner wet in any areas? There's a lot of spots that can leak on an SUV. Start by finding the highest wet point and investigate further. Like what's mentioned already, check the drains in the bottom of the doors. They should allow water to drain out.