Yesterday it rained a lot!!.. some places there were 1" of water all over the street..

today when i started my car the "door open" light came on, and stay on untill i turn the car off... i verified all doors if they were properly closed and they were... also, when i open a door (any of the 4) the light comes brighter.. as if when the doors are closed the light is 50% lit... Has anybody experienced this?