Apparently the president is...kinda...sorta...probably not really but for some reason this suddenly became top of mind. Of course space weather is a thing but for someone with a tenuous grasp of science (and of reality on occasion, but I digress...) this seems an odd sort of thing to suddenly become an executive order.
In a nutshell, an EMP attack, whether man-mad or due to space weather, will toast our electrical things on a very large scale. People don't do well when the power is out for short periods of time and, as we have seen in Venezuela, they do even less well with longer term outages.
EMP protection on a global scale is something we have no control over, but as individuals we can understand what it means and how to prepare on a personal level. Here are some resources: