Take it from a Southwest Texan - you need to be concerned about electrolyte replacemente as well as water. Had a neighbor who allowed himself to become deydrated and spent weeks in the hospital and is still using a walker. It’s a common problem in summer, and big city hospitals used to air conditioning and city living don’t immediately diagnose these problems.
Exactly, you can buy that stuff that looks like kool aid and mix it in water. Kids version is pedialyte.
It replaces those electrolytes and doesn’t taste awful like Gatorade.