I actually had to get these ants identified. Prior to this, I didn't know there were various types of fire ants with unique lifestyles. It was quite a learning process...I was googling, emailing & calling people in various states with fire ant issues. The ants we hear about most of the time, are the ones that build mounds.
There are over 200 types of fire ants!!! Ugh!!! Well, getting them identified is the 1st step, gotta know what you're up against. My local state extension service helped me, actually sent a few experts to collect some live ants.
Mine are the European Fire Ants. No mounds, so who knows where the heck their home base is! They like running up my shovel, crawl inside my glove & Sting the crap out of me. I tuck pant legs into socks, which saves my thighs from stings, but then they crawl up my clothes, I brush them off the front, but they crawl up my back then Sting the back of my neck. They know to keep crawling looking for bare skin to Sting & they sting over & over while hanging on. Try to kill by crushing...nope, they curl up in a ball, you stomp, then they unfurl & walk away unscathed! I cut 1 in half with shovel & both parts were still crawling & trying to sting, before finally dying...like it was possessed! They're evil I tell ya!
Deal with fire ants according to the type, treatment varies. Spinosad bait is best for the European as you Cannot find their home, no mounds, they truck on for hundreds of feet long, 20 feet deep, tunnels with multiple queens.
https://entnemdept.ufl.edu/creatures/urban/ants/myrmica_ruba.htm
Myrmica rubra
https://g.co/kgs/y5Ca3M
I get severe reactions to their stings, painful swelling lasts a whole week.
https://extension.uga.edu/publications/detail.html?number=B1191&title=Managing Imported Fire Ants in Urban Areas#Biology
I really want to get some phorid flies, but I guess science is still working on that idea before it can become mainstream.
https://animals.mom.com/flies-lay-eggs-ant-heads-6226.html