2002 Saturn SL1 High beams won't shut off

I was driving on a flooded section of road (I had no option, there was a median separating the sides of the road and too much traffic behind me to turn around) and my high beams turned on by themselves. Now they won't turn off. I removed the mini-fuses for the headlights so that my battery won't drain, but I need an idea on what could be wrong and how to fix it.