The US government under this president is not in the business of defending its citizens. I’m afraid that EMP defense is up to individuals.
Good luck with that.
Even a small EMP could damage several states. The power grid will likely fail. The service trucks to fix the grid probably wont start. Without power, it wont matter if your electronics are fried or not.
Without power, grocery stores, pharmacies, & gas stations are closed - no food & no gas for a generator or working vehicle. No medicines or prescriptions available. Safe water will become hard to find. Disease & starvation are likely. The sick, disabled, & elderly will suffer the most.
In about 2 weeks, anarchy will rule the streets & neighborhoods of the effected area. Police will be powerless to stop the looting & violence. Martial law will be needed but slow in coming - see Katrina.
Nationally, the stock market will crash, possibly taking the world markets with it - a nuclear war has started. Prices & lines will form in areas untouched by the blast because of the disruption to national commerce. Refugees will stream out of the area, requiring food & shelter.
The recovery period for the area & our nation could be months or years. Complete recovery may never occur. The people most likely to survive such a disaster will be those living in rural or remote areas who have some self sufficiency & supplies. City folks are mostly doomed by either dehydration, starvation, disease, or violence.
It is dangerously foolish to allow a lunatic to possess such weapons. Un & China need to be told than Un has 90 days to destroy his nuclear program or the USA will do it for him & destroy his regime in the process.
Unfortunately, we have a weak, unAmerican President who wont do a thing to stop NK. Too, I blame GWB for failing to stop it, either.