Here are important steps to inspect your car and assess flood damage:
Check your oil indicator.
If the oil level is too high it may mean that there's water in the engine. Do not start or run your car it could cause severe damage.
Measure the depth of the flood water. It is possible water did not enter any parts that are susceptible to damage.
Determine how long your car was submerged. The shorter the time, the more salvageable any damaged parts may be.
Note the type of water that flooded your vehicle. Fresh water causes less damage to your car than salt water.
Check local weather reports for the temperature during and after flooding. Warmer temperatures may speed up corrosion, especially if your car was flooded with salt water.