[jclark]

Lots of things to check but I think you may have gotten water in
your alternator and possbly hurt it.
Do you have an AutoZone store nearby? If so, take your car there and they
can check your alternator on the car.
If they can't, see if they can or somewhere else can test it if you
take it off and bring it to them. A lot of places will do that for free.
I would check that first, it shouldn't be getting that hot.
Also, take your distributor cap off and make sure it's dry and clean inside.
Same with the plug wire bays at the engine.