One significant detail that has been mentioned in these discussions has been the provisioning of new transformers. Apparently power companies don't keep a huge

One significant detail that has been mentioned in these discussions has been the provisioning of new transformers. Apparently power companies don't keep a huge backup supply of them, and they take a lot to build. If every transformer in a metropolitan area exploded all at once, then we'd be in quite the pickle. Add that up with every transformer on a single hemisphere exploding at once, and it becomes a little more grim.