Well the first one would be complete apocalypse (or at least the end of electricity), so pricing it in won't be pretty.

Transformers get fried, replacements take years to manufacture. Nuclear power plants cannot cool themselves in grid failure and need constant diesel deliveries for backup generators. Try keeping diesel flowing in the chaos of a nationwide blackout (not to mention the fairly low stockpiles eventually dry up).

So before long you have a national blackout AND nuclear meltdowns.

Literal apocalypse. Just takes one big solar storm.

GN sleep tight!