Water can be found even in barren lands. Extracting water from the air, plants and ground can be done creating make-shift solar stills. 

An article on Wikihow.com describes in detail how it can be found and can be found here.

Solar stills can be beneficial to the villagers of Longido by reusing or recycling water that they currently have. The solar stills are also created using basic materials that can be found easily and cost-effectively in their environment. Potential areas to use this concept would be in the process of brick-making or agriculture as large amounts of water is needed to sustain or maintain the projects only for the water to be wasted when they are evaporated into the air. Capturing and condensing the water would help increase water consumption and add clean water to their diet without much labour.

How to Make Water in the Desert. (n.d.). Retrieved November 5, 2014, from http://www.wikihow.com/Make-Water-in-the-Desert