Obviously, you’re going to be hot and, yes, sweat; you’ve got to replace the fluid in your body when outside. Soda, coffee, tea, alcohol, or energy drinks can actually do more harm than good due to the dehydrating effects of caffeine and alcohol. It’s also a good idea to start drinking extra water a few days before you need to be outdoors, because like me, you’re probably not drinking enough anyway.
Sports drinks are ok, but are typically about replacing sugars and electrolytes, and can be expensive. An alternative to them is eating fruits such as watermelon. If its cold, it can be pretty refreshing too!