Thick, acrid plumes of toxic haze generated by rampant wildfires across Indonesia’s Kalimantan, Sumatra and Papua regions have crossed national borders in recent weeks, engulfing neighboring Singapore and Malaysia and triggering cascading public health crises, widespread public frustration, and delicate diplomatic frictions across maritime Southeast Asia.
The annual Indonesian wildfire phenomenon, long tied to unregulated industrial-scale slash-and-burn land clearance to clear acreage for high-demand palm oil and other commercial crops, has reached unusually severe levels this year. A powerful El Niño weather pattern has amplified prolonged drought conditions across the country’s carbon-dense peatlands and old-growth forests, making blazes far harder to contain than in previous cycles. Unlike past haze events that typically dissipated within a matter of days, this year’s smog event has lingered for multiple consecutive weeks, sending air quality indices soaring to hazardous levels across large swathes of Singapore and peninsular Malaysia. Thousands of residents have reported surging cases of respiratory distress, persistent headaches and aggravated pre-existing chronic conditions, spurring widespread public anger directed at both local national governments and Indonesian authorities.
Eugene Tan, a law associate professor at Singapore Management University, noted to local and international outlets that public sentiment in Singapore has shifted to widespread frustration: “People are fed up, angry and anxious. The governments have to respond to them, or else what is more an external issue has become an internal one with ample headroom for politicisation.” Many Singaporean residents have publicly criticised their administration for failing to implement more proactive mitigation measures, even after meteorologists issued early warnings of an intense El Niño season that would raise wildfire risk.
In Malaysia, public anger has spilled into grassroots action, with thousands of local residents launching a widespread boycott of Indonesian goods, following calls from prominent opposition lawmaker Syed Saddiq to impose targeted sanctions on commercial entities directly linked to the destructive land-clearing blazes, and to treat irresponsible operators as regional outcasts. Multiple state governments in Malaysia have been forced to temporarily close schools and public recreational facilities when air quality hit dangerous thresholds.
National governments across the region have been caught in a precarious balancing act: they face mounting pressure from angry, health-endangered citizens to take decisive action, while also risking long-term damage to vital bilateral diplomatic and economic ties with Indonesia. The Singaporean government has moved quickly to roll out emergency public support measures, setting up hundreds of dedicated haze shelters across the island nation, distributing high-grade protective masks to vulnerable groups including young children, elderly citizens and immunocompromised residents, and launching formal investigations into 10 Singapore-registered firms suspected of having ties to the Indonesian land-clearing operations driving the fires. Authorities have also announced plans to update and strengthen existing haze pollution regulations to hold accountable entities operating within its jurisdiction that contribute to transboundary environmental harm.
Earlier this month, Singapore’s Foreign Minister Vivian Balakrishnan travelled to Jakarta for a face-to-face meeting with Indonesian President Prabowo Subianto, describing the discussion as “honest” and “sincere” and confirming that the two nations had agreed to establish a joint bilateral task force to coordinate wildfire suppression and haze mitigation efforts, a breakthrough that appeared to de-escalate weeks of simmering bilateral tensions.
However, the Prabowo administration, already navigating a string of domestic policy challenges, has faced widespread domestic pressure to push back against international criticism of its wildfire response. One senior Indonesian official drew widespread regional backlash after claiming the wildfires were entirely outside human control, and arguing that Singapore and Malaysia relied on Indonesia’s forests for their oxygen supply. The comment prompted an unusually public, sharp rebuke from Singapore Senior Minister K Shanmugam, who stated the remark was “disappointing” and “not right”, adding that the haze posed severe, unacceptable risks to public health across all affected nations, and that coordinated action against polluting operators was in Indonesia’s own national interest as much as that of its neighbours.
Days after that public exchange, Indonesia announced a planned reduction in gas exports to Singapore, citing unmet domestic energy demand amid recent localized electricity shortages. While Singaporean authorities confirmed the cut would amount to less than 2% of its total daily gas needs and have negligible impact on national energy security, the timing of the announcement – coming shortly after Indonesia’s energy minister warned the country would halt gas exports to nations that did not “respect Indonesia”, and remarks from Prabowo referencing unnamed “countries that like to insult Indonesia” – led many regional analysts to interpret the move as a deliberate retaliatory measure. Eugene Tan noted the dynamic reflects longstanding regional tensions rooted in the historic “abang-adik” (big brother-little brother) cultural framing, where Indonesia’s political circles often expect smaller, economically powerful Singapore to defer to its larger, more populous neighbour.
By contrast, Malaysian federal officials have taken a far more restrained public stance on the haze crisis, with Foreign Minister Mohamad Hasan explicitly ruling out formal diplomatic protests or legal action against Indonesia, noting such steps would risk irreparably severing longstanding bilateral ties. Kuala Lumpur has instead opted to negotiate a new memorandum of understanding with Jakarta to strengthen cross-border wildfire prevention protocols, and has stated it will rely on existing ASEAN multilateral frameworks, including the 2003 ASEAN Agreement on Transboundary Haze Pollution, to coordinate regional action. But critics widely dismiss the decades-old agreement as structurally toothless: it lacks any enforcement mechanisms to penalise rogue agricultural firms or compel member states to enforce domestic anti-deforestation rules. James Chin, a professor of Asian studies at the University of Tasmania, described the accord as “just not worth the paper it was signed on”, noting that once seasonal winds dissipate the haze and public pressure fades, regional governments consistently revert to unregulated business as usual. The bloc previously set a 2020 deadline to eliminate all transboundary haze, which passed without progress; a new revised target of 2030 is now widely viewed by experts as equally unachievable.
Malaysia’s own position is further complicated by its status as one of the world’s top palm oil exporters, with its own domestic history of slash-and-burn land clearance that has at times generated local haze events. Regional analyst Ei Sun Oh of the Pacific Research Centre of Malaysia noted that Kuala Lumpur also lacks the same economic leverage over Jakarta that Singapore holds, as Singapore ranks as Indonesia’s single largest source of foreign direct investment and a leading offshore financial hub for wealthy Indonesian nationals. For the time being, Oh added, Malaysian officials have opted to avoid provoking Jakarta unnecessarily, waiting for seasonal wind shifts to blow the smog away rather than taking confrontational diplomatic action.
