If there is a danger of the fire reaching the fuel tanks, they should scuttle the ship. Sink her at the pier. Because the water is so shallow there that would likely only flood the lower decks. But that would put a wall of water between the fire and the fuel.
Having been in the navy I can tell you the water level under that ship is a few feet. They know where each ship can dock. I don’t think sinking it would do more than drop it a few feet.