Hi Iowan_Juggalo,
The only way you can hurt your engine is if your car got stuck in a flood with water up to the top of your hood. By just rinsing water on your engine compartment with of course electrical components nicely protected as you mentioned, I don't think you have anything to worry about. When you turn your engine back on, the heat generated from your engine should evaporate any moisture.
Aloha,
~Ranney