What Happens when you Drink ice Water on an Empty Stomach?

I saw a story that drinking water on an empty stomach first thing in the morning, helps heal many illnesses.
Has anyone tried this, and does it really work?
I started doing this yesterday, and today by drinking one glass of ice cold water.
So far it makes my coffee feel not as hot in my throat. Plus I feel a more alert.
Is there really truth to this theory?