On saturday I was out of town and was only able to drink 10 cups and I normally drink 20. The next morning when I woke up my mouth was so dry that I wasn't even able to swallow. So, I assume I was suffering from dehydration.
A year ago I used to only drink 2-4 cups of water/day and my mouth was never this dry the next morning. What I figure happened is my body has become accustomed to needing the gallon+ water/day. Has this happened to anyone else?