Some parts of Texas battered by the winter storm had relatively few homes lose power.(1) Texas counties with fewer power outages are not part of state grid – YouTube
In Canada, if the power goes out, they hook train locomotives into the grid. They are diesel powered, and can generate about 5000 KW in electrical power each. In cases where there is a port, large ships can do the same thing, and they can potentially serve as a backup power generation source.