Why is water leaking under the back doors

Check the drain holes in the bottom of the doors. They sometimes get clogged with debris and water finds it's way inside.

http://www.cargurus.com/Cars/Discussion-c5647_ds476715

Thanks for the tips. A couple of weeks ago someone checked the drain holes at the bottom of the doors and said this was not the problem.

This has just happened to my 06 kia cerato and i wish i knew how JuliaF found the problem.