Long ago, when EMPs became a real threat, we should have embarked on a progrm of systematic decentralization of our power grid. Which the few smart people have been saying for along time.
IMO, DC has orchestrated the centralization of the grid deliberately so that it can be used as a weapon in the event of massive civil disturbance or rebellion. The people resist tyranny and, boom, down goes the power for 1/3 of the country. Everyone talks tough about standing up to the feds, but what happens when there is no power in multiple states?
Best get ye to Texas, where the federales can't play that game.