Indonesian wildfires have caused respiratory infections to surge past 110,000 cases in early September, triggering severe public health warnings across the region as toxic smoke blankets Sumatra and Borneo. According to the Indonesian Ministry of Health, acute respiratory infections linked to smoke from forest and peatland fires reached 113,336 cases by September 9, more than doubling from 50,891 cases recorded at the beginning of the month.
Health Crisis and Vulnerable Populations
The Ministry of Health reported that over 12.5 million people have been exposed to the hazardous haze across seven provinces. Among those affected, thousands of young children require urgent medical care. According to government data, more than 12,000 cases involved children under the age of five during July and August.
Imran Pambudi, the government’s director of Health Services for Vulnerable Groups, stated that the environmental emergency has rapidly evolved into a public health crisis. Medical supplies have been bolstered at public health centers, referral hospitals, and evacuation sites. In addition, the Indonesian Health Ministry has established emergency outposts equipped with oxygen cylinders to treat patients suffering from smoke inhalation and exacerbated respiratory conditions.
Arson Investigations and El Niño Weather Pressures
Most of the fires have been deliberately started by individuals or corporations clearing land for agriculture, according to government officials. In response to the widespread blazes, the Indonesian National Police have arrested at least 139 people for arson, naming 138 suspects and launching investigations into eight companies connected to the wildfires, as reported by The Jakarta Post and the Indonesian National Police website.
The intensity of the 2026 fire season is the worst observed in the country in eleven years, fueled by a strong El Niño and prolonged drought conditions. Raja Juli Antoni, Indonesia’s forestry minister, warned that September marks the peak of the El Niño weather pattern and represents the main fight for authorities trying to control the flames. Approximately 202,000 hectares burned between January and July according to government figures, while the environmental organization YKAN estimates that an additional 600,000 hectares were damaged in August alone.
Regional Impact and International Support
The toxic haze has crossed national borders, degrading air quality in neighboring Malaysia and Singapore. Educational disruptions have also followed the smoke, forcing more than 1.4 million students to attend classes remotely, according to The Associated Press. In Palembang, southern Sumatra, local authorities temporarily closed 1,030 schools, impacting over 250,000 students due to severe air pollution.
International aid has arrived to support containment efforts. Japan dispatched three CH-47 Chinook helicopters to assist with water bombing operations in Borneo, while Malaysia offered additional aerial assistance. Meanwhile, veterinary teams continue to treat wildlife harmed by the thick smoke, including an endangered orangutan rescued from a palm-oil plantation after suffering from severe respiratory distress.
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