I'm pretty sure but not positive.. I think power utilities in major cities have been establishing secondary command centers for power generation, and I bet they have been stockpiling replacement parts.
The effect of an EMP would be devastating. I don't disagree with that, but I think a half year might be the longest we might have to endure with minimal power. Replacing domestic and non-essential infrastructure will be the most expensive and time consuming.
In the end, maybe Y2K was, at least, useful in getting us to pay attention. I have wondered about the fragility of the power grid - especially after the power outages that occurred last year or the year before in the northeastern US.