Health Ministry activates emergency centres over Anak Krakatau ash — 3.3 million elderly "at risk," first two hospitalisations confirmed in Serang

Safety & SecurityIssued: September 7, 2026

Beyond the airport closures and the ashfall reaching Jakarta itself (see our other articles), the health response to Anak Krakatau's ash has escalated on 7 September 2026. Health Minister Budi Gunadi Sadikin has told residents of affected areas to stay indoors unless necessary and to always wear a mask and eye protection outdoors, and the Ministry has activated its Health Emergency Operating Centre (HEOC) from the national level down to district/city health offices in Banten, DKI Jakarta and West Java, instructing puskesmas and hospitals to run 24 hours in case of a patient surge. The Ministry's Director for Vulnerable-Group Health Services says roughly 3.3 million elderly people across the five affected provinces (Lampung, Banten, DKI Jakarta and parts of West Java) face elevated health risk, citing the sharp silica content of volcanic ash as more dangerous to lungs, eyes and skin than ordinary dust. Banten's provincial health office has confirmed the first two hospitalisations — Serang residents referred for acute respiratory infection (ISPA) — while stressing that ISPA case volumes at community health centres remain stable overall. Jakarta's own air quality index climbed through the day, from 101 at 06:00 WIB to a projected peak of 156 in the evening.

Timeline

Sun 6 Sep
Health Minister Budi Gunadi Sadikin issues the Ministry's formal statement on kemkes.go.id: "If there is no urgent activity, try to stay indoors. But if you must go out, always make sure to wear a mask and glasses." Further guidance: do not rub eyes if ash gets in them — rinse with water and use eye drops if needed; shower and change clothes after outdoor activity. Medical and N95 masks, oxygen cylinders and concentrators, nebulisers, respiratory medication and eye/skin treatments are distributed to affected areas. Vulnerable groups named: children, the elderly, and people with chronic respiratory or cardiovascular disease.
Sun 6 Sep
The Ministry activates its Health Emergency Operating Centre (HEOC) at the national level and cascades it down to district/city health offices across Banten, DKI Jakarta and West Java, instructing puskesmas, hospitals, public health labs, quarantine posts and health posts to operate 24 hours according to local contingency plans.
Sun 6 Sep, 22:08 WIB
Ati Pramudji Hastuti, Head of Banten's Provincial Health Office, confirms the first two hospitalisations: two Serang district residents referred to a hospital in Serang City for acute respiratory infection (ISPA) linked to ash exposure. She says ISPA case volumes at puskesmas remain stable with no significant increase so far, and notes BPJS (national health insurance) coverage in Banten stands at 98.84%, with government support available for unregistered low-income residents concerned about treatment costs.
Mon 7 Sep, 09:07 WIB
Imran Pambudi, the Ministry's Director of Health Services for Vulnerable Groups, says roughly 3.3 million elderly people across the five affected provinces face elevated health risk: "Volcanic ash has different characteristics from ordinary dust. Its sharp silica content makes it dangerous for the lungs, eyes and skin." He lists respiratory risks (ISPA, breathlessness, asthma flare-ups), cardiovascular risks (elevated blood pressure, heart attack and stroke potential), eye and skin irritation, and psychological effects (confusion, stress, depression) as concerns specifically for elderly residents.
Mon 7 Sep, morning–evening
Jakarta's IQAir-measured air quality index climbs through the day — 101 at 06:00 WIB, 106 at 07:00, around 109 through 08:00–09:00, projected to reach 136 by 16:00 and peak near 156 in the evening. Ozone remains the officially flagged dominant pollutant, so — as with the previous day's readings — the exact share attributable to volcanic ash specifically cannot be isolated from the AQI figure alone. Mask advisories are also being broadcast inside Jakarta's KRL commuter trains.

Key points

Core guidance from the Health Minister: stay indoors unless necessary; if you must go out, always wear a mask and eye protection; don't rub ash out of your eyes, rinse with water instead; shower and change clothes after being outdoors.
What the AQI numbers in this article mean: Jakarta's readings are reported on the standard US EPA scale (0–500), used by IQAir and most air-quality apps. 0–50 is Good; 51–100 Moderate (acceptable, but unusually sensitive individuals should consider limiting prolonged outdoor exertion); 101–150 Unhealthy for Sensitive Groups (children, the elderly and people with heart or lung disease should limit prolonged outdoor exertion — this is where Jakarta's morning reading of 101 fell); 151–200 Unhealthy (everyone may begin to notice effects, sensitive groups more seriously — this is where the evening's projected 156 falls, and the point at which the Health Ministry's mask-and-limit-outdoor-activity guidance applies to the general population, not just vulnerable groups); 201–300 Very Unhealthy (health alert — avoid outdoor exertion); 301+ Hazardous (emergency conditions affecting everyone). Note again that the officially flagged dominant pollutant behind these particular readings is ozone, not volcanic ash specifically.
Vulnerable groups repeatedly named across ministry statements: children, the elderly (roughly 3.3 million across the five affected provinces), and people with chronic respiratory or cardiovascular disease.
As of the most recent update, confirmed hospitalisations remain limited to two cases (Serang, Banten), and Banten's own health office describes puskesmas-level ISPA case volumes as stable rather than surging — treat this as a real but so far contained health impact, not (yet) a mass-casualty event.
Treatment cost is not a barrier for most residents: BPJS coverage in Banten is cited at 98.84%, with government support for unregistered low-income residents.
This is a Health Ministry-level escalation distinct from, and issued after, BPBD DKI Jakarta's own city-specific advisory (13:06 WIB, 6 September — see our separate article on ash reaching inside Jakarta city).

What this means for your Indonesian entity

For your Indonesian entity, this is a duty-of-care and continuity issue layered on top of the travel/logistics disruption covered in our other articles. Three practical steps: (1) Make sure staff — especially anyone older, pregnant, or with asthma, other chronic respiratory conditions, or heart disease — have access to a proper mask (the Ministry specifies medical or N95/KN95, not a plain cloth mask) and are told to avoid rubbing their eyes if ash gets in them. (2) Consider flexible or remote-work arrangements on days with visible ashfall or when Jakarta's AQI is elevated, particularly for vulnerable staff, given the Ministry's own emphasis on limiting outdoor exposure. (3) If a staff member develops respiratory symptoms (cough, wheezing, chest tightness, shortness of breath) after ash exposure, treat it as a genuine medical concern worth prompt attention — puskesmas and hospitals in the affected provinces have been placed on 24-hour standby specifically for this. This is orientation, not medical advice; for anything beyond general precautions, direct staff to local health services or their own physician. For the airport and travel-route implications of the same eruption, see our other articles; for embassy-level guidance, the Japanese Embassy in Jakarta's advisories remain the authoritative source.

Sources

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