I mean, coal-based combustion has been a source of heat for over a century, with its systems able to withstand subzero degree temperatures all across the northern hemisphere. If they can't get their systems to work in this environment then their grid is even worse than Soviet Russia. I can see issues arising because of nat gas equipment freezing, similarly to how gas companies have to add liquid methanol into propane so the lines don't freeze, which will probably be illegal at some point since it's methanol.
