If it was just powerline transients, a good whole-house surge protector might have prevented any damage. Look at the 51110-PTC made by Leviton. We use that here, and it is compatible with X10 communication. That version also includes surge protectors for phone and satellite lines, which are other routes for a lightning transient to get into your home.
Nothing can prevent damage from a nearby or direct lightning strike. Back east we had a bolt hit a tree maybe 50 feet from the house. It blew off bark along one side, and blasted up some dirt near the base. We believe a fork of that bolt hit the driveway about 10 feet from the house, as evidenced by a gray circle about the size of a dinner plate in the otherwise black asphalt coating. When that hit, the alarm system (not X10) started to scream. The sensor for a door in the wall nearest the strike had been welded closed. The alarm system was totally confused, and had to be reprogrammed. However, nothing else that was plugged into the AC powerline was effected in any way.
Jeff