Will an EMP (electromagnetic pulse) occurrence affect everything with electrical wiring? I have a new metal roof and two barns with lightning rods with 6 foot solid copper rods for grounding. Would an EMP destroy this? Will my automobiles that have computers be worthless after an EMP? Could I take the batteries out of my 1980 and 1987 vehicles and transfer them?
A: An EMP will destroy all electronics that are not properly shielded. One way to shield them is with a Faraday cage. The EMP would not destroy the barn itself, but all electronics contained therein and their wiring would be fried. For your cars, all electronics would be fried and their computers would be worthless and unsalvageable, so transferring the batteries would be a futile exercise. Only older vehicles without computer technology would be useable after an EMP, but some of the ignition system would probably be damaged or destroyed.