Originally Posted By: 2005RedTJ
and preparing to open a door once the pressure equalized.

That is now not the preferred method (at least for this week).
It can take a long time for the car to fill with water and equalize during which you can sink a long way in deep water. It can also get stuck in weeds/mud/debris on the bottom jamming the doors shut.
Current thinking seems to be to get the windows/doors open immediately and get out as fast as you can.