When I was talking with my son's friend today about the storm and how people are buying water, he said, "There's going to be plenty of water!"  LOLHe's right. If you  have a very good water purification system, you'll be able to drink rainwater, no problem. (Berkey water filter is probably the best.)
@HollyHobby:
I've been drinking rain water since I was a little kid. No purification needed.
Lots of wimpy kids up here. 4951