When I was younger it wasn't a problem. Now I will drink over 2 gallons on a day I don't forget to drink. If I don't drink, I will get cramps later on, usually in the evening. Next day I will cramp up when I use a particular muscle. I'm used to being outside and all kinds of weather, and infrequent meals. I get more dehydrated than I realize then have cramps all night, really hate it I got to drink a qt of water and go for a walk when I should be sleepin.

I just had a friend have a heart attack due to dehydration. His kidneys also plugged up. drinkin more water probably woulda helped him. I usually carry 1-2 gallons of water with me now.