The core of the earth is 6,000°C (10,832°F), the same  temperature as the surface of the sun. We don’t burn our  feet when we walk around barefoot outside thanks to the  insulative properties of Earth’s crust, but anywhere in  the world if you drill deep enough, you reach boiling, even  supercritical temperatures. 

At 10 kilometers of depth or  shallower, just about every point on earth has sufficient heat  for power generation. This massive heat resource is viable  for electricity production in much of the State of Texas,  including near its major population centers, at approximately  6.5 kilometers, a drilling depth typical in parts of the world  within the oil and gas industry. 

In fact, analysis shows that it is likely hotter  in the Texas subsurface than previously estimated, by as  much as 15 percent. This difference is significant enough to  improve both project economics, and technical feasibility of  geothermal development in the State