I’m amazed they had the wit to get the windows down before the car electrical system shorted... usually people drown in cars because they can’t get the windows down.
The electrics on those old manual crank windows never shorted out. Water filled up near the top and you could open the window and swim out.
Of course, you can open the door when the water gets near the roof, too.
My spring loaded glass buster is velcroed to the dash next to the ignition for that reason.