An author named William Forstchen (spelling?) wrote a book called "ONE SECOND AFTER" about an EMP attack. Some believe it's pretty accurate, others claim it exxaggerates, but it is pretty wrenching.
A lot of the bad guy stuff was exaggerated (cannibals!), but infrastructure stuff was pretty well done. Examples: The main character's daughter dying from lack of insulin; most all the folks in the nursing home dying; food. Newt Gingrich actually wrote the forward, IIRC, as he was big on EMP preparedness at the time.
Coincidentally to this thread, I just finished rewatching
Jericho on Netflix.