The kinds of protection used to protect electrical components from lightning might help some

But, the problem becomes the nature of an EMP disturbs in some ways all electrons present in the air and to some degree other forms of matter or plasma too. So, anything that is on electrically might melt. TVs like Flat screens might melt and regular  CRT screens would blow up or better said "IMplode which means when something implodes the glass in the right side of the Cathode ray tube implodes the left side goes right and the right side goes left and the pieces of glass likely would be sticking holes in the walls to the left and right and up and down in all directions after implosion from an EMP.

So, though lighting rods and other anti-lightning protection could work some just understand that all electrons inside and outside of atoms will be agitated during a Localized or nationwide (continental) EMP.

A Solar Flare EMP the size of the Carrington Event would be hard to estimate what that would do. In 1859 it caused Aurora Borealis effects as far as Cuba I believe.

arstechnica.com

The solar storm of 1859 (also known as the Carrington Event) was a powerful geomagnetic solar storm during solar cycle 10 (1855–1867). A solar coronal mass ejection (CME) hit Earth's magnetosphere and induced one of the largest geomagnetic storms on record, September 1–2, 1859.

Solar storm of 1859 - Wikipedia

https://en.wikipedia.org/wiki/Solar_storm_of_1859

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Solar storm of 1859 - Wikipedia

https://en.wikipedia.org/wiki/Solar_storm_of_1859

The solar storm of 1859 (also known as the Carrington Event) was a powerful geomagnetic solar storm during solar cycle 10 (1855–1867). A solar coronal mass ejection (CME) hit Earth's magnetosphere and induced one of the largest geomagnetic storms on record, September 1–2, 1859.

‎Solar storm of 2012 · ‎List of solar storms · ‎Geomagnetic storm · ‎Solar cycle 10

What If the Biggest Solar Storm on Record Happened Today?

https://news.nationalgeographic.com/.../110302-solar-flares-sun-storms-earth-danger-...

Mar 4, 2011 - Repeat of 1859 Carrington Event would devastate modern world, experts say. ... In fact, the biggest solar storm on record happened in 1859, during a solar maximum about the same size as the one we're entering, according to NASA. ... Solar storms aimed at Earth come in three stages, not all ...