It’s eerie but it’s true: Three people have died this summer after suffering rare infections from a waterborne amoeba that destroys the brain.

This is the time of year when there is an uptick in cases. The amoebas flourish in the heat — especially during the summer months in the South, thriving in warm waters where people swim.

Health officials usually record about two to three cases in a given year — 1980 was the highest with eight deaths. And most of the time, they occur in children and teenagers

The amoeba, called Naegleria fowleri, is the only type that infects humans and is more than 95% lethal. The first death in 2011 occurred in June in Louisiana, according to the CDC