Moisture problems . In some rare cases, fire ants nests can be found in very unusual situations, such as roofs of buildings or in wall voids. Fire ants do not necessarily require soil for a suitable nesting site-but they do require a certain amount of moisture. Be certain that your roof drains properly. Movement of plants .
Potted plants are an oasis for red imported fire ants during hot and dry Oklahoma summers.
Many people move plants in and out of the house. When bringing plants in, be very careful not to bring in pots that contain fire ants. Movement of toys and other objects . Be careful when bringing most any object in from outside your home. Fire ant colonies will build their nests up into cavities in molded plastic toys and other hollow objects.