Eagle #1 is correct folks. You can take all the precautions you want via building faraday cages, etc., however the primary risk is an EMP event taking down the nations power grid. An EMP pulse will propagate down power transmission lines, taking down electrical switching stations, transformers, and will likely spike your gear and kill it. Keep in mind America's electrical power transmission and distribution infrastructure is archiac and poorly maintained. One such event (even a significant solar event) and it goes bye bye.