Earlier quoted context omitted.
We could decouple transformers to stop them from being destroyed. Wiring is easy to repair, it's the transformers that are vulnerable.
We 'could' at least in theory. The actual response I expect is something closer to "don't look up"
[1] https://solarsystem.nasa.gov/solar-system/sun/exploration/
[2] https://www.swpc.noaa.gov/phenomena/solar-flares-radio-black...