For some intersting reading, you may wish to check out this web site:

http://www.hprcc.unl.edu/nebraska/Lake-Mead-2007.html

There are many links within this article to connect you to other areas in the western USA where the drought conditions are drastic.

There is another site which tracks the drought impact in each State. It can be found at:

http://www.drought.unl.edu/

Both sites are worthwhile checking out.
It is also important to have this knowledge so we better understand the pressures that are going to be applied to Canada to give up their water rights. We must not allow this to occur!