http://vsezivotnye.ru/wp-content/uploads/2016/02/109.jpg

Camels do not store water in their humps, as it is commonly believed. The humps are actually reservoirs of fatty tissue. Concentrating body fat in their humps minimizes heat-trapping insulation throughout the rest of their body, which may be an adaptation to living in hot climates.
https://www.youtube.com/watch?v=fsltM-0mEbw