
When news broke that volcanic ash from Ethiopia's Hayli Gubbi eruption had entered Indian airspace, especially over Delhi NCR, it sparked understandable concern in a city already battling hazardous air pollution levels. But atmospheric scientists and meteorological agencies have clarified that while the ash plume did drift at high altitudes across India, it never descended to ground-level concentrations capable of harming people directly. This distinction is crucial. Volcanic ash is not toxic smoke but a fine mixture of rock, minerals and acidic gases, often small enough to behave like PM2.5 particles. If it were present at significant concentrations near the ground, the health impact could be severe. But in India's case, the ash remained dispersed in upper air layers and did not interact with the air Delhi residents breathe.
However, doctors caution that the existing air pollution crisis in Delhi NCR is already severe enough to trigger exactly the same respiratory, skin and eye symptoms commonly associated with volcanic ash exposure. In other words, while the volcanic plume itself posed no danger, the city's air remains unhealthy, and residents must continue to take strong protective measures.
To help navigate the current air-quality situation, NDTV spoke to several Indian specialists who have shared practical, medically sound steps citizens should follow until pollution levels ease.
According to Dr Rajesh Kumar Gupta, Director, Institute of Respiratory Medicine and Interventional Pulmonology, Yashoda Medicity Indirapuram, volcanic ash consists of "extremely fine particles, often under 10 microns, small enough to bypass the nose's filtering system and reach deep into the lungs."
However, he emphasises that India did not experience this type of exposure. Satellite models showed the ash plume stayed at high altitudes and did not mix with Delhi's ground-level air.
This means the symptoms that people in Delhi may have experienced yesterday, like irritation, bronchial inflammation, and oxygen-level disturbances typically linked to ash, were not caused by the volcanic plume, but continue to be driven by Delhi's PM2.5 and PM10 pollution, which remain elevated.
Even without volcanic ash settling locally, doctors warn that Delhi's air pollution, one of the worst globally, can produce similar symptoms like:
This makes precaution equally important, even though the volcanic ash itself was not the direct cause.
Dr Gupta recommends measures that are relevant not because of volcanic ash landing in India, but because Delhi's pollution alone is hazardous enough to cause respiratory flare-ups.

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Dr Manoj Kumar Goel, Principal Director & Unit Head - Pulmonology & Sleep Medicine, at Fortis Gurgaon emphasises some more steps for proper respiratory health:
He stresses that children, older adults, pregnant women, and those with lung or heart disease must take extra precautions.
Even though volcanic ash did not settle over India, Delhi's pollution still irritates the skin. Dr Rashmi Sharma, Senior Consultant Dermatology, Fortis Gurgaon recommends:
Dr Parul Maheshwari Sharma, Principal Director & HOD - Ophthalmology, Fortis Gurgaon, highlights:
Children and the elderly are particularly vulnerable, she adds.
The Ethiopian volcanic ash plume may have passed over Indian airspace, but experts confirm it never reached levels that posed any direct health threat. However, Delhi NCR's ongoing air-pollution crisis continues to endanger respiratory, skin and eye health, and the precautions recommended for volcanic ash exposure remain equally essential for everyday survival in the city's hazardous air.
Doctors unanimously emphasise staying informed through IMD and SAFAR updates, limiting outdoor activity, wearing certified masks, maintaining healthy indoor environments, and seeking prompt care if symptoms worsen.
Disclaimer: This content, including advice, provides generic information only. It is in no way a substitute for a qualified medical opinion. Always consult a specialist or your own doctor for more information. NDTV does not claim responsibility for this information.
The Delhi government on Thursday rolled out its "toughest-ever" anti-pollution drive in the capital -- deploying mist spray technology, tightening enforcement, and warning officials of strict action.
India faces a severe public health emergency as air pollution worsens across major cities. Padma awardee doctors' issue urgent advisory and here is what you need to know to stay safe.
The Delhi government is preparing an extensive plan to deploy mist spray technology to combat air pollution in the capital, Chief Minister Rekha Gupta said on Thursday.
Rao Narbir Singh said that most devices cannot display readings beyond 500 AQI, even when the actual pollution may be far higher.
Congress Parliamentary Party chairperson Sonia Gandhi on Thursday asked the Centre to take action to curb air pollution in Delhi-NCR, saying the children and elderly are suffering.
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