EMP Ping!
Underground wiring is essential especially when dealing with natural disasters such as tornados and hurricanes.
Underground wiring and underground fiber optics would get rid of a lot of ugly eyesore telephone poles and make outages from weather a thing of the past.
This concern is stupid beyond imagination. Terrorists are a million times more likely to detonate a nuke on the ground. Why would they bother with a fancy airburst (which would require ballistic missles or jets to transport it) when a ground explosion would be so much easier and more destructive? Any sitution were an airburst would be likely (exp: full-blown nuclear war with China) the status of our electrical instruments would be the least of our concern.