 Trump responding to Biden's barbs about the hush money trial during the debate last night. Finding your car submerged or partially underwater because of a flood is stressful, as you might imagine. MarketWatch has steps to take when you have a flooded car. Number one, prevent additional damage. Don't try to start it until a mechanic has looked at it. If water has entered the cylinders, attempting to turn on the engine can cause significant damage. Lift the hood, disconnect the battery while wearing dry gloves to prevent electrical shorts and further damage to the car's complex electrical system.