OCU,
When I was a kid, my family spent a few weeks at Willard Bay Resevoir - near Ogden, Utah. When I revisited it in 2004, I took the first two pictures below.
The water levels were so low that the pond - which used to contain rentable motorboats that could then be driven out into the reservoir - no longer had an exit. See picture #1.
As for the resevoir itself - well, I walked several hundred yards into it and took the second photo. Once upon a time, I'd have been 50 feet underwater. So Dallas isn't the only place to experience a drought. It happens somewhere all the time.
I found the final picture of Willard bay on the internet. It may account for some of Dallas's missing water. The "bay" seems to have recovered.
| 
