Where does the water go?

A question that crossed my mind last night during the race, related to Charles comment about water in the cockpit. I don’t know if this could become an issue or it’s just a minor one no one cares. What happens in rainy races with water going into the cockpit? Does it accumulate in the seat in a big enough quantity to become noticeable? It goes out somewhere trough the floor? Does the fireproof overall “absorbes” it? It’s come into consideration after the session when drivers/cars are weighted?