Water on the drivers side floor
 

Does anyone know where the drain valves are located on a 2004 mazda 6? I am getting water on the drivers side floor and sometimes on the passangers side. This occurs after it rains and the water is also coming out of an outlet in the fire wall on the engine side. I am thinking it is a clogged drainge tube but not sure. It rained a lot recently and I have water under the carpet on the drivers side. Any ideas are appreciated.