The roof is leaking
How did you realize that the roof is leaking.
I saw the water coming down the walls
Then you should get it to fix asap. It is going to have devastating effects like water damage and even electrical fires. You will need to also deal with mold which can cause death.
I'm going to drill a hole in the floor and let it leak out there.
Not sure drilling a hole in the floor is going to fix anything. You should not just try to band-aid issues like leaks in the house. There is a lot of damage that can be caused from a leak that will ultimately just lead to much more work that needs to be done if you are not careful.