I aint guessing. If you read my whole post you would have seen I was talking about survival plan in the event of a long term loss of electricity, specifically in a city.
.....Geesh, Quit assuming to be god and read a whole post!
Your words were (and I quote): “I dont know what an EMP burst would do to the electrical grid.”
Read, become enlightened, don’t guess.
To do otherwise, well, start practicing various superstitions ...