Mount Anak Krakatau Ash Poses Health Risks, Epidemiologist Warns

Volcanic ash from Mount Anak Krakatau is not ordinary dust. It contains silica particles that resemble sharp shards of glass and can damage the eyes, nose, mouth and skin, Griffith University epidemiologist Dicky Budiman warned.

Exposure can cause red, stinging and watery eyes, sensitivity to light and, in some cases, scratches on the cornea. The ash can also trigger conjunctivitis, with burning and redness. In the respiratory tract, it may cause irritation in the nose and throat, a runny nose, dry cough, shortness of breath or chest pain.

People with asthma or chronic bronchitis may face more severe symptoms, including coughing up phlegm and wheezing. Budiman urged people to avoid strenuous activity when ash levels are high, because rapid breathing can draw fine particles deeper into the lungs. Fresh ash can also carry an acidic coating before rain washes it away, increasing irritation to the lungs and eyes.

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Volcanic ash is vastly different from ordinary ash or dust because it contains silica, which resembles sharp shards of glass, and can cause damage, particularly to exposed areas such as the eyes, nose, mouth, and skin.

He advised residents to clean ash with water as soon as possible, without rubbing it into surfaces or shaking dusty clothing, which can spread the particles. Windows and doors should remain closed except when necessary. People who go outside should cover their skin and wear a tightly fitting mask, such as an N95, along with safety goggles or glasses.

Anyone experiencing shortness of breath, chest pain or eye irritation should seek medical care immediately. Budiman also urged the public to follow official government updates and remain vigilant without panicking. Mount Anak Krakatau, in the Sunda Strait, has continued erupting, with its highest intensity so far in 2026.

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I want to emphasize the need to remain vigilant and follow updates from official government sources, while also avoiding panic, as panic can ultimately be detrimental to us all.