There is no lake at Camp Green Lake. There once was a very large lake here, the largest lake in Texas. That was over a hundred years ago. Now it is just a dry, flat wasteland.
There used to be a town of Green Lake as well. The town shriveled and dried up along with the lake, and the people who lived there. (1.1-2)
The digging got easier after a while. The ground was hardest at the surface, where the sun had baked a crust about eight inches deep. Beneath that, the earth was looser. (7.19)
There was a change in the weather.
For the worse.
The air became unbearably humid. Stanley was drenched in sweat. Beads of moisture ran down the handle of his shovel. It was almost as if the temperature had gotten so hot that the air itself was sweating. (29.1-3)