Agreed—I am thinking about tropical storms and hurricanes that knocked out power lines here in New England over past decades.
We did not have transmission lines knocked over—and it still took a couple of weeks for more power to be restored after a major storm.
I would be impressed if they just replaced the major transmission lines in thirty days—and then it would probably take a few weeks after that to work their way through the rest of the system.
My armchair estimate—six week range to get 90% of customers back on line...
Except you didn't have 150 mph winds up there.