Not an expert, have experienced heat exhaustion several times, in a variety of environments. (Low Humidy, High Humidy and Freezing Cold, figure that one out)
One thing a doctor told me was that if the fluids passed are not clear, then you are not over hydrated. Anytime the fluid is dark, then you are low on water. It won't always be clear, but dark is bad. If it is clear, then you are definitely hydrated.
Granted those terms are subjective, I have found that if I need to go to the bathroom and it is not light, I need some water. Why, cause the fluids being passed are not water but byproducts of other stuff in the system.
Also drinking Adult Beverages is definitely one way to abuse your body's hydration. It only took me 40 years to learn that one. So on the course it is a rarity I ever partake. After the round may be a different story, but I can asure you for every ounce of Adult Beverage I drink I will drink 3 to 4 times that of water. Also it helps in not getting hung over...
