Mandatory power plant winterization coming to blame-shifting Texas KTRK Share: HOUSTON, Texas (KTRK) -- As power returns, the crisis continues for millions of Texans who are still boiling their drinking water. Meanwhile, politicians continue to shift blame. Our 13 Investigates looked at how Texas was left so vulnerable, starting with Gov. Greg Abbott who appoints the Public Utility Commission. The Public Utility Commission oversees ERCOT and allowed it to make power plant winterization rules voluntary. After a storm in 2011, the North American Electric Reliability Council, a federal regulatory group, suggested in this report that power plants should winterize not just to the average Texas winter, but to be able to withstand "unusually severe events."