Is water enough?

Posts 3 and 4 hit the nail on the head.

Alcohol and coffee are diuretics and even though you are essentially drinking water, you can quickly become dehydrated.

Did you ever have kidney stones?

I know one of the things I do is stay out of the sun on the hottest part of the day if I can. Drink water during the day, and not a large amount at one time. A large amount at one time will cause you to urinate more frequently. Slower water consumption will decrease urination.

I'm pretty sure with your medical issues being dehydrated can't be good. Be careful.