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Wildfire smoke caused 3,560 deaths in Indonesia during September

A new study has revealed the severe toll of Indonesia's September wildfires, with smoke-related deaths significantly exceeding previous estimates. When combined with urban and industrial pollution deaths, total air pollution fatalities for the month reached 5,310.

LSN Malaysia · 30 October 2026

Wildfire smoke caused 3,560 deaths in Indonesia during September

Research findings have shed light on the deadly impact of Indonesia's wildfire season, identifying smoke inhalation as responsible for approximately 3,560 deaths during September alone. The figures represent a substantial public health crisis linked to the recurring seasonal fires that blanket the region with hazardous smoke.

The comprehensive study examined multiple sources of air pollution affecting the Indonesian population during the period. Beyond wildfire smoke, researchers documented 1,750 deaths attributable to urban and industrial pollution, underscoring the compounding effects of various air quality threats.

Combined, these figures indicate that air pollution caused an estimated 5,310 deaths in Indonesia during September, highlighting a critical environmental and health challenge. The data underscores the urgent need for regional air quality management strategies and cross-border cooperation, given the transboundary nature of wildfire smoke in Southeast Asia.

Indonesia's vulnerability to seasonal wildfires remains a persistent concern, particularly affecting neighbouring countries including Malaysia through transboundary haze. The research provides crucial evidence for policymakers considering long-term interventions to mitigate air pollution-related mortality and protect public health across the region.