EMP'S: EMP's (electromagnetic pulses) can be generated either by the detonation of a nuclear device a hundred kilometers or so above the earth, or by sufficiently massive solar mass ejections such as the Carrington Event of 1859. In the event of a Nuclear EMP attack it's unlikely you'll need to worry since only a few countries could carry it off and it would be suicide for them to detonate a single EMP producing bomb over the US. Any EMP attack would slmost certainly be accompanied by a full scale nuclear attack against major military and population centers and the loss of electricity would be least of your problems! That's why no one needs to worry about nuclear EMP's.
As for extreme coronal mass ejections that could seriously degrade or take out the electrical grid they are certainly possible. It is estimated such events might occur every 500 years or so. However you will have up to several days notice of any such event. This is plenty of time to protect your electronic equipment by placing it within 'Faraday cages'. A Faraday cage is simple a box, preferably grounded, of metal or fine wire which conducts an EMP around its contents thus protecting them from harm.
Microwave ovens are Faraday cages designed to keep EM waves inside and thus can be used to protect small electronic devices from external EM waves as well. Home appliances such as refrigerators and ovens, to the extent that they have metal skins, can protect electronics as well. Metal bathtubs with either sheet metal or AL foil over the top also function as Faraday cages, and metal trunks also work. Any such device would protect electronic devices from harm even if the external grid was damaged. In all cases devices inside Faraday cages must be placed on insulating material so as not to contact the metal surface.
EMP's don't harm humans directly but they could potentially cause fires from large electrical surges sparking from wires. To minimize this risk all switches in a house should be turned off, and all individual circuits isolated by removing fuses and tripping circuits, especially where the main power enters the house.
With these issues addressed the EMP risk is essentially that of long term loss of electricity which is addressed separately here.
You need to worry about thing like not smoking and eating healthy and driving carefully much more than EMP. After all survivalism is about survival from all causes. It always makes me LOL when I see so called survivalists storing guns and bunkering down when they don't even know how to live healthy right now...