Texas has it's own separate electrical grid from the rest of the US. This was done for political purposes so that they didn't have to deal with Federal regulations.
https://www.texastribune.org/2011/02/08/texplainer-why-does-texas-have-its-own-power-grid/
https://www.texastribune.org/2011/02/08/texplainer-why-does-texas-have-its-own-power-grid/
