Hydrate, but make sure you don't drink too much water, either

To say it's hot outside is a drastic understatement. Of course one needs to hydrate during this time, but some could take this too far. To learn more about "over-hydration" read this very timely article by Pam LeBlanc: http://www.austin360.com/recreation/hydrate-but-make-sure-you-dont-drink-too-2402981.html