Health officials across the United States are issuing warnings about the rare but deadly amoeba *Naegleria fowleri* as summer approaches. This microscopic organism, often referred to as the "brain-eating amoeba," thrives in warm freshwater environments such as lakes, rivers, and hot springs. Infection with *Naegleria fowleri* can lead to a severe and rapidly progressing brain infection known as primary amebic meningoencephalitis (PAM).