If it is raining as hard as it was raining here, and you are driving on the highway, turn on your headlights, highbeams off, and make sure your taillights are on. If they are off, the car behind you can't see you within stopping distance, in case of emergency.

Your preaching to the converted!

Having troubles with your tail end?

Swamp Daddy : having trouble seeing the car in front of me. Also big highway pile up on the other side, likely a result of the same issue. Lots of hydro planing.