In Southern California, the bulk of our water is imported from hundreds of miles away via the State Water Project, the Colorado Aqueduct, and the Los Angeles Aqueduct. After the dryest year on record, followed by a below average rainfall year-to-date, the Sierra snowpack and reservoirs are way down. They're warning of possible water rationing this summer and encouraging conservation.

 

But we won't do anything because we can take everyone else's water first!

 

You can drink salt water?

So some degree, it certainly is a question of running out of water. Some aquafirs only have a certain amount of water, and that water is replenished at a certain rate. Take water out at a faster rate, and you'll eventually run out. And with the low replenish rate, people won't be able to important things like water crops or, well, drink water.

it's not so much that the Earth is running out of water, we just have too many people in areas with limited fresh water available. The Colorado River only flows so much, and if you keep increasing the population of Southern California, well, you'll eventually have a problem.

There's a reason that water rights is a serious, serious business.

 

the water you use is from some river somewhere. I don't know about arizona but I know about Vegas and California.
there are big fights about who gets how much water. Lawsuits galore.
this is why there are no lawns in vegas - it's illegal.
yes it's possible to take ocean water but you have to remove the salt first - expensive process.

 

Well, since according to Al Gore, the ice caps are melting, use more water!