Grid failure

[wallm]

Since we seem to be heading to some sort of confrontation in the Korean peninsula, there has been some talk about risk to our electric grid.

http://tinyurl.com/llwxmgv

Some of us live in cities like myself. I read the article above and it talks of 90% death rate on East coast. Are they talking about people not having food, water, sanitation, etc or some other reason? Yes, the risk of riots. I just need to get my first firearm and stock up on ammunition.

I doubt either NK or Iran can explode a nuclear device in the atmosphere resulting in an EMP over the east coast. But just in case, what are we supposed to do to prepare?

I know I avoid taking unnecessary risks. I am currently prepared with emergency food for 3 months (including ways to cook it if electricity/gas are out) and less than that for water. What else should I or those who think like myself prepare for? What are you preparing for, if at all?