When we had the CME headed towards Earth recently, I was pretty amazed at the sheer number of highly-upvoted HN comments whose authors seemed to believe that the power grid, copper phone lines, and communications satellites were all about to be wiped out.
Fortunately, most engineers in all of the fields above are well aware of the Carrington Event. And while it's not beyond possibility that there might be some corner cases if (when?) another one happens, we know how to design these systems to keep another one from causing any major outages or damage.