Don’t panic if you get stuck inside
When a car is stuck in water, the force that standing water exerts on the doors is much higher than you might think. This could prevent the doors from opening. In such a scenario, the first thing to do is to keep calm and not panic. Then, attempt to open the doors by pushing it with both legs. In case this does not work, use a heavy, blunt object (anything from a tyre iron to the headrests) to break one of the windows.