That's pure Hollywood drama. I demand Bratt Pitt!
So basically, worldwide EMP.
Not at all. Collapse of large parts of the electrical grid due to induction in large conductor loops, sure. Cities will become a bit difficult to live in for a few months; it would actually bring home to the yanks what it means to be on the receiving end of a "shock and awe" and a "mission accomplished". On the other hand, what will be up pretty much immediately will be GPS and battery-powered computers. Until the batteries run out, that is.
Meanwhile, I hear the Ebola breakout in Sierra Leone is intensifying...