This story from Texas is sad, but it gives us insight into the fact that just one sting from an insect could kill you. “Texas student dies after allergic reaction reportedly caused by ants on football field“.
Just one sting from a honeybee or wasp can kill some people, it is more rare for Fire Ants to kill someone. However the Red Imported Fire Ant continues its move across the U.S. Here is some information from the University of Florida – IFAS office on Red Imported Fire Ants.