A 12-year-old boy has died from a brain-eating amoeba after swimming in a South Carolina lake over the July Fourth weekend.

Officials with the Centers for Disease Control say climate change raising freshwater temperatures may contribute to conditions that allow the amoeba to thrive.

Two weeks after Jaysen Carr spent the Fourth of July swimming and riding on a boat on one of South Carolina’s most popular lakes, he was dead from an amoeba that lives in the warm water and entered his brain through his nose.