https://www.scientificamerican.com/article/why-the-deep-freeze-caused-texas-to-lose-power/

On Sunday night, as a burst of Arctic air swept southward across the Great Plains, power plants in Texas started flicking offline.

Wind generation fell 32% between 9 p.m. Sunday and 3 a.m. Monday local time, according to U.S. Energy Information Administration figures. Coal dropped 13%. And natural gas generation, the cornerstone of the Texas grid, plummeted 25% over that six-hour period.