The presence of Naegleria fowleri in popular national parks highlights a potential health risk for visitors engaging in water activities. Infections occur when contaminated water enters the nose, leading to primary amebic meningoencephalitis (PAM), a rare but almost always fatal condition. Early symptoms include headache, fever, and nausea, progressing to confusion and seizures. The amoeba's northward migration due to rising global temperatures underscores the need for increased monitoring and public awareness.