The answer to 'why is my fire ant invasion' is that fire ants have infested your property, likely due to favorable environmental conditions and the availability of food sources. Fire ants are aggressive, invasive insects that can build large mounds in lawns, gardens, and around structures, and they will sting humans and pets that disturb their nests.
Common causes of fire ant infestations include mild winters, drought conditions, and the presence of abundant food sources like pet food, fallen fruit, or organic matter. Symptoms may include numerous fire ant mounds, swarms of ants, and painful stings if the nest is disturbed. To solve a fire ant problem, you may need to use a combination of baits, insecticide treatments, and cultural controls like removing food sources and disturbing mounds.