Scarcity of water in Hermosillo

"Tandeo" in Hermosillo

Since January 16th of 2010 the water in Hermosillo has been rationalized, the president from the "conaguah" has decided to give 8 hours a day of water to each neighborghood here in Hermosillo.

This situation makes me wonder, if the scarcity of water is that bad,I think that keeping families from having water all day long is reasonable, because there is water scarcity in all the world but, why specfically in the "tandeo"? I know that it is mostly because we have don't have any reservation of water.

And thinking more generally, I wonder if the third world war will be because of water.