As the number of nests found at Oakey is rising, but its rising rivers nearby that have experts truly worried. 

For months, the Condamine-Ballone river system has been in-and-out of major flood following heavy rainfall in January and February. It's not much of a problem for residents used to it, but that was before they new fire ants were in the area.

The crafty critters can build rafts to travel on flooded rivers, and finding them in one of the largest catchments inside Australia's largest river system could have devastating consequences for everyone.