This story was originally published by ProPublica. In January 2014, power plants owned by Texas’ largest electricity producer buckled under frigid temperatures. Its generators failed more than a dozen times in 12 hours, helping to bring the state’s electric grid to the brink of collapse. The incident was the second in three years for North Texas-based Luminant, whose equipment malfunctions during a more severe storm in 2011 resulted in a $750,000 fine from state energy regulators for failing to deliver promised power to the grid. In the earlier cold snap, the grid was pushed to the limit and rolling blackouts swept the state, spurring an angry Legislature to order a study of what went wrong. Experts hired by the Texas Public Utility Commission, which oversees the state’s electric and water utilities, concluded that power-generating companies like Luminant had failed to understand the “critical failure points” that could cause equipment to stop working in cold weather. In May 2014, the PUC sought changes that would require energy companies to identify and address all potential failure points, including any effects of “weather design limits.” Luminant argued against the proposal. In comments to the commission, the company said the requirement was unnecessary and “may or may not identify the ‘weak links’ in protections against extreme temperatures.” “Each weather event [is] dynamic,” company representatives told regulators.

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