Econo-Girl is doing what she does only a few times a year. She is hiding indoors. The heat just dashing from the car to the grocery store was enough to cause heatstroke. Econo-Girl has had heatstroke before and it was not pleasant.
Water is essential in the dire heat. In fact, water is essential no matter what the weather is.
It isn't unreasonable to think that batteries and advancements in solar panels will relieve the U.S. appetite for oil. Imagine the Middle East situation when no one cares about them at all. Imagine still further that water was increasingly in short supply. Econo-Girl smiles at the thought.
Fights over water are already erupting in the Nevada desert. Which is why Econo-Girl would sell any Las Vegas real estate NOW. The current population levels are not sustainable.
In Africa, water wells are being poisoned by natural minerals. Usable water is increasingly in short supply.
The idea is people fighting for life, not mere economic growth. Ooooh. It should be ugly.