After heavy rainfall, the roadways can sometimes become flooded with water and you might have a difficult time trying to drive through the water. In some instances cars can be overpowered by the water and be left useless.
“If you don’t know how deep the water is, then don’t drive through it. The best plan is to park your car on the highest ground possible and take shelter. If a vehicle is driven through standing water, a driver risks flooding the engine, warping brake rotors, loss of power steering, or a short in the electrical components of the car, all of which can be costly to repair.”
Jennifer
Moore, AAA spokeswoman

Here are 10 tips on how to avoid getting your car stuck in flood water:
# 1- Try and avoid still water if possible.
#2- Use your fog lights, these can really improve your visibility in flood conditions.
#3- Leave doubble the space in between you and the car ahead of you since your breaks wont work as good.
#4- Test your breaks, often in deep water the breaks will fail.
#5- Do not drive into moving flood water if its deeper than 4 inches, moving water can sometimes be surprisingly strong so it is best not to test how strong the water is with your car.

#6- Do not drive fast, drive slow to not make a bow wave and to avoid aquaplaning.
#7- If your car does manage to get stuck, most of the time it is better to sit in the car and wait for help.
#8- Drive in the middle of the road, most of the time it is higher elevated than the sides.
#9- Try and drive right behind another car, doing this will create a bit of a wake for you and your car will get better traction this way.
#10- If you see any fallen power lines, avoid the street at all costs, if these wires are still live they will have the chance to seriously injure a person.