Fire ants often prefer to reside in massive cities that are made up of more than 250,000 worker ants in each group. The reason fire ants are able to live in such large colonies is that they reproduce very quickly. In fact, one queen ant can lay up to 1,600 eggs in just one day!
Yes! Although they do hurt a lot, fire ant stings are not likely to be extremely harmful—except for the small percentage of people who are allergic to the venom they inject. For these people a sting can be lethal if not treated right away.
It's not recommended. Fire ants can usually determine when a repellant is sprayed and avoid it. So while you will have some dead ants, the fire ants that avoided the spray will often start new colonies with new queens, causing you a bigger headache.