If you want to protect your electronics from an EMP attack or occurrence, there are a few actions you need to take.
The shielding bags are very nice, because they come in many sizes that can be stored in your BOB, a desk drawer, your vehicle, or anywhere else you can think of where you may need one for quick use to protect your electronics from an EMP. Faraday cages are simple to make - the first consisted of a small room covered in metal foil, with the foil successfully countering high-voltage discharges from an electrostatic generator and preventing changes in the electrostatic environment inside.
In the event of an eminent EMP attack, wrapping your electronics in aluminum foil might provide a modicum of protection. Ideally, a Faraday cage would divert the energy from an electromagnetic pulse and prevent damage to the electronics within. In the event of an EMP, the cord of your microwave (if plugged in) could also act as a ground, further helping discharge any energy. Batteries will normally not be affected by an EMP if they are separate or disconnected from a circuit pathway, but I store mine in the same place as that of my protected electronics for organizational reasons.

This will help to prevent the Electromagnetic Pulse (EMP) from entering the unit and harming the circuits inside the device. Also see the new Directory of EMP Protection and Solar Rooftop Products now under development by Don White. A related popular myth is that there is a sharp and well-defined boundary between what is protected from EMP and what is not. For information about the EMP sensitivity of solar panels, and more details on the shielding of solar panel systems, see Donald J. There are other ways of shielding units and mobile devices from an EMP, by encasing them in a Faraday Cage.
The energy from an EMP is a extremely fast moving and powerful energy, but also a temporarily existing energy of sorts.
A electrical engineer friend of mine made this comment to me when I asked about EMP’s.

James Woolsey, a long-time foreign policy expert who served as head of the CIA from 1993-1995, warned that North Korea probably already has a nuclear weapon specifically designed to generate an electromagnetic pulse (EMP) so powerful that if it were used in an on attack the United States, it would threaten the future of American civilization.
An upper atmospheric detonation of a nuclear device basically produces an EMP (actually 3 distinct pulses) that covers a huge range of the EM spectrum. Also, I do not know how severe an EMP that occurs might be or how close the source that generated it is.
Let's answer this question as we look at the nature of electromagnetic pulses and if your microwave could prevent damage from an energy attack.

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