I just want and ordered 2 emergency hammers to knock out car windows in case this happens to me also.
I think everybody should know about this. Most cars have headrests like this, and they’re always available:
https://lifehacker.com/use-your-headrest-to-break-a-car-window-in-an-emergency-1496717463
Good idea. A heavy multi-function tool or knife will do the job too, as will a hefty metal flashlight, although the flashlight won’t cut a seat belt. A big ol’ heavy metal scissors will even do the trick, if one can find a good place to stash it. I like the idea of something that will fit in a storage compartment or glovebox*, as something that’s out and loose / maybe under a seat has multiple disadvantages depending on the situation.
*Does anyone keep gloves in the glovebox anymore? :-)
Many vehicles made in the last 4 years or so use laminated glass (like the windshield) on the side windows instead of tempered glass.
Tempered glass breaks easily with a spring loaded center punch but we saw out laminated glass with basically a saw-z-all blade with a handle and a point to knock a hole with.
You are not going to be able to force the door open if there is more than a few inches up against the outside.
The windows, electric or manual will be wedged shut with a few inches of water.
Electrical is going to fail pretty quickly in deep water.
Getting in the water is going to be quite risky without any type of flotation device.
Best bet is exit a window or sunroof early and go for the top of the vehicle or better yet a tree if possible.