get backups of your most critical devices, put in box, then put that box in a box covered in aluminum foil, sealed, no holes in the foil, and protect the foil with aplastic sheet. try to use paper to make sure inner box is not touching any side of the outer box, try to center it in the inner box.
Let me know when you have done that. And what you consider critical devices in your home. Air Conditioner? Spare PC?
Once you have done it personally, we can move on to business: Internet Data Centers, Medium Voltage Switchgear for most refineries, 15,000 Hp motors on pipelines...
An old microwave oven functions as an expedient Faraday cage.