This is what 'peak oil' means.
A Texan tragedy: ample oil, no water Fracking boom sucks away precious water from beneath the ground, leaving cattle dead, farms bone-dry and people thirsty
In Texas alone, about 30 communities could run out of water by the end of the year, according to the Texas Commission on Environmental Quality.
Nearly 15 million people are living under some form of water rationing, barred from freely sprinkling their lawns or refilling their swimming pools. In Barnhart's case, the well appears to have run dry because the water was being extracted for shale gas fracking.
The town - a gas station, a community hall and a taco truck - sits in the midst of the great Texan oil rush, on the eastern edge of the Permian basin.
A few years ago, it seemed like a place on the way out. Now McGuire said she can see nine oil wells from her back porch, and there are dozens of RVs parked outside town, full of oil workers.
But soon after the first frack trucks pulled up two years ago, the well on McGuire's property ran dry.
No-one in Barnhart paid much attention at the time, and McGuire hooked up to the town's central water supply. "Everyone just said: 'too bad'. Well now it's all going dry," McGuire said.
Ranchers dumped most of their herds. Cotton farmers lost up to half their crops. The extra draw down, coupled with drought, made it impossible for local ranchers to feed and water their herds, said Buck Owens. In a good year, Owens used to run 500 cattle and up to 8,000 goats on his 7,689 leased hectares (19,000 acres). Now he's down to a few hundred goats.
You can still get oil. It just costs more. A lot more. And much of the price isn't paid at the pump.