we have pest service.
he mentioned that (( yes i know what you are going to say here)) Windex works to mess up there chemical trail. if you see them inside - you can spray the area with windex... also if you can find how they are getting in from the outside - hose that as well with Windex.
I would prefer GREEN options -- but Fire Ants are my personal exception.. if needed i would Scorched Earth the yard if we had that bad of an Infestation of them..
stayiing on top of them has kept them at bay.
Steve AKA Doofus