A great article appears in the March Section Report of the Oil, Gas and Energy Resources Law section report, by Jacqueline Weaver, Professor Emeritus, University of Houston Law Center: “The Railroad Commission’s New Duties to Keep Texans Warm: Winter Storm Uri Forces Change.” Here are some excerpts:
The throughput of dry gas production from Permian Basin processing plants dropped 85% from early February to February 18,  and two-thirds of the gas processing plants in the Permian Basin had outages. The natural gas industry blamed electricity suppliers for cutting off power to them when they most needed it; power generators blamed the gas industry for failing to supply gas to them. Many natural gas providers had not filed a short form with ERCOT, the grid operator for most of Texas, that would have exempted them from electric outages during emergencies. The Railroad commission seemed unaware of this form and exemption process. Clearly, the natural gas and electricity sectors needed to communicate and coordinate more closely. In the ERCOT system, natural gas provides about half of all electricity generation.
According to an FERC-NERC Staff Report on Storm Uri: