[nickdothutton]

Heating can be quite significant. I guess whether or not it’s economically significant depends on your cost of generation. There was a mega-outage which cut off Italy when overheated, sagging cables, struck the treetops in the middle of either another random outage or some scheduled maintenance. It’s been many years since I read the full report on the incident (which was excellent) but there was some great data in there about degrees of heating vs degree of sagging.