Hydrolock = dead car.
Liquids cannot be compressed very well. When your car takes in a lot of liquid, water, it tries to compress it like it always does with air/fuel. Well when it tries and fails the connecting rods end up being the weak point and get some bent.
That is very bent. I stopped by a local garage yesterday to pick up some parts and they already had 3 cars that died in the water. Listen people, you drive a car, it's not a boat, tank or an off road vehicle. It's a car. Do NOT drive in water. At all!