Hmmmmmm, do you park the car under a tree?
Sounds like the cowl drains are plugged and full of water to me.
Depending on which model/year car you have, there are a couple of drain hoses that exit either through the firewall or the trans tunnel (under the car).
These drain the water that gets into the cowl area, and they can get plugged with leaves-dirt-debris etc.
Usually a straigtened out coathanger or similar type of "tool" can be used to clear them.