Baby camels are born without a hump. They won't develop one until they start eating solid food.
Picture from HD Wallpapers
Contrary to myth, water is not stored there. A camel's hump is made up of fatty tissue that can be converted into energy and water. As the camel draws upon these energy reserves, the hump shrinks. If the fat deposits are truly depleted, the hump will flop over and hang down the camel's side. A week of food, water and rest will restore a camel's hump to its proper shape.