Widespread wildfires across Sumatra and Indonesian Borneo have blanketed parts of Southeast Asia in toxic smoke since mid-July, affecting millions of people in Indonesia, Malaysia, Singapore, and the Philippines. Air quality in affected areas has deteriorated to hazardous levels, with some measurements exceeding World Health Organization safety guidelines by more than 15 times. Health authorities have documented substantial public health impacts, including over 50,000 respiratory infection cases recorded between July and August, with more than 12,000 cases involving children under five years old.
Residents across the region have reported acute symptoms from prolonged smoke exposure. Classroom visibility has become severely compromised in some areas, and both children and adults are experiencing respiratory distress, sore throats, and eye irritation. Asthma and conjunctivitis cases have risen notably in Malaysia as air quality continues to deteriorate. A particularly severe El Niño weather pattern is exacerbating drought conditions and enabling the fires to spread more rapidly and extensively than typical fire seasons.
Experts attribute the current crisis to decades of landscape transformation, beginning in the Suharto era when vast rainforest and peatland areas were converted for commercial purposes including logging, plantations, and development projects. Many large-scale fires are reportedly connected to industrial land clearing practices, with some environmental organizations and researchers alleging that certain companies deliberately use fire for rapid land preparation. Unlike traditional small-scale burning practices that are community-managed and monitored, these large-scale operations create fires that are difficult to control and generate widespread environmental and public health consequences.
The fires burning through tropical peatland ecosystems present particular concerns, as these landscapes normally function as massive carbon storage systems. When drained or burned, peatlands can rapidly release accumulated carbon into the atmosphere, creating what researchers describe as “carbon bombs.” Government forecasts suggest the current El Niño conditions could result in burned areas reaching approximately 11 million hectares, potentially matching one of Indonesia’s most severe wildfire periods from 1997 to 1998. Officials have indicated that September represents a critical phase in the crisis, with the El Niño conditions expected to intensify during the month ahead.
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