Every time water splashes under my car, my steering goes stiff and something screeches in my engine. Help?

Like if I drive over a big puddle or whatever. I'm sure it has to do with the power steering, but what? It's a '97 Taurus, in case you need to know.

Every time water splashes under my car, my steering goes stiff and something screeches in my engine. Help?
check power steering belt, it's gets loose when it gets wet, might need a new one or just tightened