Rotating power outages continued to impact Texas end-users on Tuesday as the Electric Reliability Council of Texas (ERCOT) scrambled to restore service amid a blast of arctic cold that sent the electric grid and natural gas markets into chaos.

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About 10,500 MW of customer load, equal to the demand of about 2 million homes, was shed at the highest point on Monday as the extreme weather caused “many generating units – across fuel types – to trip offline and become unavailable,” ERCOT said. 

The independent system operator, which manages the flow of electricity to more than 26 million Texas customers, said that while it was “already contending with frozen wind turbines and limited gas supplies to generating units on Feb. 14, a significant number of additional generating units...