IF it dries up, than it might be an indicator, but so far, I haven't seen much more than conjecture in either of those articles. Saint's article tries to make a big issue by measuring water at Lake Powell but doesn't even mention it's actually higher now than a few years ago.
I don't know, on an issue like this, I don't think we want to wait to see
IF it happens before we start doing something about it. It is likely that we will hit a point of no return at which point we are incapable of fixing the problem.
I find it odd that we will wage war on another country on the prospect that they COULD do something to us but when it comes to our climate, so many people are willing to wait for a global disaster before they are willing to address the issue.
It seems to me, that the things we could do now only have beneficial outcomes and could actually put the U.S. in a better position in the future.
If we divest ourselves of Middle East oil and move to green solutions:
1) We can stop fooling around with countries that don't like us and cut off their source of income.
2) We can develop new technologies that will put us ahead of rest of the world.
We can create new markets and rule them as we have in the past.
3) As a side benefit, If global warming is real, we solve the problem.
Look at the Japanese, they build the most fuel efficient cars and are doing very well.
The American manufacturers build gas guzzlers and they aren't doing well.
Regardless of why the American automakers aren't doing well, the Japanese aren't hurt by being greener.