Fire ants are a major problem in Raleigh and Fayetteville North Carolina. If you haven't seen fire ants in your yard yet there is a very good chance that you will. Initially you will usually notice the mounds they create. These fire ant mounds are usually bigger than the mounds created by other types of ants. If you notice them in your yard you should not mess with it Fire ants are extremely aggressive and their stings hurt very much.
AAA Exterminating Co's Blog
The red imported fire ant was introduced into the United States in the 1930's. Traveling in soil used as ballast on cargo ships that arrived in Mobile, Alabama from South America. South Americans don't have nearly the problem that the United States does. They only have 20% as many fire ants as we do, probably because North America lacks the natural enemies of Fire ants.