Deadly East Java Fires Fuel Regional Haze Crisis as Singapore Presses Companies Over Smoke Sources

Indonesia's prolonged wildfire season claimed four lives this week when firefighters and volunteers battled flames inside Bromo Tengger Semeru National Park in East Java. Two additional personnel suffered serious burns and continue to receive treatment. The deaths highlight the growing danger faced by ground crews as dry conditions linked to a strong El Niño keep large areas of forest and peatland burning for months.

The same fires have generated thick smoke that has drifted across Southeast Asia, degrading air quality in Singapore, parts of Malaysia, and other neighboring areas. At times Singapore has ranked among the most polluted major cities on independent monitors, while some locations in Indonesia have recorded hazardous readings. Health authorities in affected Indonesian provinces have reported sharp rises in respiratory complaints. Schools have closed in several places, and flight schedules have been disrupted as visibility drops and health risks increase.

Singapore's government has responded with concrete legal steps. Prime Minister Lawrence Wong indicated that the country would use its Transboundary Haze Pollution Act where evidence justifies action. The National Environment Agency subsequently issued preventive notices to seven companies whose land in Indonesia has been linked to smoke reaching Singapore. The notices instruct the firms to deploy resources to extinguish or contain fires on their concessions, stop any burning activities, and submit written plans showing how they will prevent further outbreaks. Three of the seven companies had previously received similar notices during the severe 2015 haze episode, and those earlier cases remain open.

The current fire season is widely described as one of the most intense in more than a decade. Official Indonesian data from earlier in the year showed substantial burned areas, while independent monitoring groups have estimated even larger extents of damage across Sumatra, Kalimantan, and other islands. Many of the fires occur on peat soils or on land used for plantation agriculture, where burning has historically been used to clear vegetation. Once peat ignites, the fires can smolder underground for long periods and release large volumes of smoke even after surface flames appear controlled.

Indonesian authorities have described firefighting as a high-risk operation and emphasized the need to protect personnel while continuing to monitor hotspots in priority provinces. They have increased the number of personnel deployed compared with earlier in the season. Regional partners, including Singapore and Malaysia, have offered assistance, and the World Meteorological Organization has urged ASEAN countries to improve resource sharing, early-warning systems, and long-term changes in land-management practices.

The combination of on-the-ground fatalities, widespread health effects, and cross-border legal action illustrates how Indonesia's seasonal fires have again become a regional problem rather than a purely national one. With the dry season still underway and El Niño conditions expected to persist, the risk of further casualties, prolonged haze, and additional diplomatic friction remains high. Addressing the underlying drivers—peatland drainage, weak enforcement against illegal burning, and the economic incentives for land clearing—will require sustained cooperation that goes well beyond the immediate response to this year's smoke.