Ways to create city-wide blackout?

I am working on a fictional story and have been researching ways for my antagonist to cause massive damage to electronics across a big city (blackout). Nuclear detonation at a high altitude is out of the question, and the only other suitable non-nuclear EMP device I have found is a flux compression generator. Would such a device be powerful enough? Exactly what effects would it have upon the city's electrical infrastructure? Would the damage be temporary or permanent? If it does not work, what other ways could a devious, resourceful villain use to achieve this end?
Asked Nov 12, 2013

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