electrical problem, battery constantly drains after rain showers and c, need help asap maybe electrical diagram with the dome lighting? Options

[Crzybakerdog]

hey guys it stormed pretty hard while i was at work and when i got out to my car and opened the door the electrical system was running, this has happened before and the only real way to fix it was for the car to dry out and not have water anywhere, i was playing around with the dome light and if you switch it on off what have you, the car will start to beep in different modes when you open the door almost as if it is somehow connected to short coming to drain the battery. has this happened to anyone else? or know where i can check to see if certain drain holes are blocked somehow in the car cause i dont want the battery to die before i have to go to work in the morning.