In Revelations it states that the whole world will look upon the bodies of the slain prophets for 3 1/2 days. So, I think we will have internet and electricity until then, but after that, all bets are off.
Bible doesn’t mention America at all, so the grid going down here wouldn’t be a stretch of the imagination at all. I hold to the theory that because the Bible doesn’t mention us at all when it comes to the end times, something happens to this nation before hand to make us a non-relevant entity on the world stage. Lets face it, right now we still have way too much influence on the world for Rev prophecy to start kicking in. When Obama is done with us however, who knows??