In a spherical cow market, the power producers in Texas would have sold contracts for "electricity (except when below 40 degrees)" so consumers would have known what they're getting into.

Since contracts are superior to everything else in a spherical cow market, CEOs of companies who sold contracts for "electricity" and then couldn't supply it would have had their homes raided and everything they owned traded for generators and fuel until their customers had electricity again. Maybe the customers would've even had the right to do the raid themselves.