Health Officials Warn Swimmers: Peak “Brain-Eating Amoeba” Season Underway as Summer Temperatures Rise
July 6, 2026
As summer temperatures continue to climb, health experts are issuing urgent warnings to individuals seeking relief in natural bodies of water. The arrival of peak summer heat marks the official onset of “brain-eating amoeba season.”
Rising temperatures drive more people to lakes, rivers, and local swimming holes. However, these warm freshwater environments are also the ideal breeding grounds for Naegleria fowleri, commonly known as the brain-eating amoeba.
Understanding the Risk
While infections are rare, they are highly fatal. The amoeba typically enters the body through the nose when people dive, swim, or submerge their heads in warm freshwater. Once inside the nasal passages, it can travel to the brain, causing a severe and usually fatal infection known as primary amebic meningoencephalitis (PAM).
How to Protect Yourself
Practicing key safety measures when swimming in natural freshwater during the hot summer months can significantly reduce the risk of exposure:
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Avoid Submerging Your Nose: Keep your head above water, use nose clips, or hold your nose shut when jumping or diving into warm freshwater.
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Avoid Disturbing Sediment: The organism is often found in the sediment at the bottom of lakes and rivers. Avoid digging or stirring up soil in shallow, warm water areas.
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Monitor Water Conditions: The risk increases significantly during prolonged periods of high temperatures when water levels are low and water temperatures are high.
