Rain/roadwater splashing against crank-pulley. Slipping P/S & Alternator belts...

Anyone have this happened before?
Sometimes when I drive through (shallow) puddles of water, I completely lose the powersteering in my '73 Dart, which can be quite a scare when coming up to a corner.
Occasionally the alternator-charging also cuts out for a while.

I'm thinking the car needs some splash guards badly around the engine bay.
* Just don't drive in the rain or through puddles! lol..