https://www.ready.gov/kids/know-the-facts
https://www.ready.gov/kids/games/data/dm-english/index.html
http://www.wikihow.com/Escape-from-a-Sinking-Car
Advice for escaping a sinking car
If a car you are in starts to sink, get out as fast as possible.
Do not phone for help or try to retrieve possessions.
There is very little time.
Open the windows straightaway before contact with water makes the electric system fail or water pressure stops you winding the windows down.
If that doesn’t work, get the door open, undo your seatbelt and get out.
The third option, in last resort, is to pull a headrest out and use the metal part of it to hit the window, hard, in the corner and hopefully break it open.
If you are underwater when you leave the car, push away from it, and if you don’t know for sure which way is up, check what direction bubbles are floating in and swim that way.
SOURCE :BBC
http://www.bbc.com/news/av/uk-40345702/tips-for-staying-cool-by-people-from-hot-countries