The logic sounds reasonable: water pressure holds the door shut, so wait until the car fills up, pressure equalizes, door opens, you swim out. Clean and simple. Also deadly.
Here’s the problem. Gordon Giesbrecht, a retired professor who spent his career studying vehicle submersions at the University of Manitoba, put it plainly: “There are no good scenarios where waiting increases your chance of survival.” None. Not one.
And even if you were willing to gamble on waiting, the pressure doesn’t just snap into balance the moment the car goes under. The inside and outside pressure won’t equalize immediately after the car is completely submerged — so you’d be sitting in a filling car, running out of air, waiting for a moment that takes longer than you think.
The actual move? Act in this order: unbuckle your seatbelt first, then get your window open or broken before the water reaches the bottom of it. Once water is pressing against the glass from the outside, the pressure makes the window impossible to open or break. You have a short window — literally — right after the car hits water. That’s your moment.
Also note: electric windows can stop working once water gets into the electronics. Don’t count on the button. Act before the water rises.
Don’t try to open the door — water pressure makes it extremely hard to open, and forcing it will flood the car faster. Go for the window. A window punch tool kept in your car can break tempered glass in one strike. If you don’t have one, a hard pointed object aimed at a corner of the glass is your best shot.
The car sinking feels like the emergency. But the real clock starts the second water starts rising inside. Move fast, move early. Waiting is not a strategy.
I’ve been telling my teenagers this for years. The window punch tool tip is something everyone should have in their car honestly.