If there is an oil fire, you should never put it out with water. When you deep fry, water is a very dangerous liquid to use. When water comes in contact with oil that is 350°F or hotter, it turns into superheated steam right away. The water quickly expands, which can cause oil to splash and cause burns and other injuries. Don't let water into the fryer while you're deep-frying food, and don't use it to cool or clean this kitchen tool.