As the tempurature begins to rise outside, we have to make sure we are drinking enough water to stay hydrated. Most of your life you have been told to drink water. Here are a few reasons why you should drink water. Drink half your body weight in ounces to stay fully hydrated. Ex: If you weight 150 lbs then that would be considered 150 oz and you would drink 75 oz odf water. If you are on medication or doing some intense workouts, go ahead and drink some more.