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Indonesian wildfires trigger hazardous air quality alerts across Southeast Asia

Severe air pollution from Indonesian fires has prompted regional health warnings and school closures across the Philippines and Borneo, with air quality indices reaching hazardous levels in multiple locations.

LSN Singapore · 1 September 2026

Indonesian wildfires trigger hazardous air quality alerts across Southeast Asia

Widespread forest fires in Indonesia have triggered a cascade of air quality emergencies across Southeast Asia, forcing authorities in neighbouring countries to issue health alerts and implement precautionary measures. Air quality readings in parts of the Philippines and across much of Borneo have climbed into the "very unhealthy" and "hazardous" categories, posing significant health risks to residents and prompting immediate action from regional governments.

Schools in affected areas have suspended classes as a protective measure, while health authorities have advised residents to limit outdoor activities and use protective masks. The deteriorating air quality has raised concerns among environmental and public health officials, who warn that prolonged exposure to such pollution levels can aggravate respiratory conditions and affect vulnerable populations including children and the elderly.

The transboundary nature of the pollution underscores the region's environmental interconnectedness and the challenges of managing cross-border air quality crises. Regional governments have coordinated responses to monitor air quality indices and issue real-time advisories to the public, though the persistence of fires in Indonesia suggests the situation may continue to affect neighbouring nations in the coming days.