A few weeks ago now I had to get pulled out of a bit of deep water. Deep enough that water was definetly in the engine compartment, but not deep enough that it got to the intake and flooded me out. As soon as I was back on dry land, my power steering was completely gone. I pulled over, left the hood open to dry everything out, then started back on my way figuring out if I could make it or not with the steering. At some point it came completely back and I didn't think much of it since. However, today while driving I noticed a humming noise from the engine compartment and the power steering seems to be getting pretty difficult. Any thoughts on what might be causing this or what I should look for to see if my power steering is working correctly?