Additional information
It's summer and it's HOT! There's no avoiding it (unless you live in Antarctica). When it's hot, your body perspires (aka sweats) as a natural means to thermoregulate itself. All of that perspiration that's cooling you down primarily consists of water. The more you perspire the more water comes from your body and the less hydrated you become. If you're not putting fluids back in your body, eventually you'll become dehydrated. Dehydration is an excessive lose of body fluids and can result in headaches, dizziness, decreased blood pressure, and (in extreme cases) death.