There's the East coast, and west coast, and texas.

The split is somewhere in the middle of the country.

I don't know why Texas has it's own grid, but that's how it is.




By Grid, I mean that everything is connected.

That's how widespread blackouts happen, if a section overloads, it spreads to other parts, creating more and more black outs.

Kind of like pulling the plug on your PC before a thunderstorm, to avoid the power surge from a lightning strike.