The Singapore Institute of International Affairs has issued a red-risk rating warning of a high probability of severe trans-boundary haze in Southeast Asia [1, 2].
The warning signals a potential public health and environmental crisis across the region. Severe haze often disrupts air travel, damages respiratory health, and impacts economic productivity in major urban hubs.
The high-risk period is expected to cover the second half of 2026 [3], with specific risks remaining through August 2026 [4]. This red-risk rating is only the second such assessment issued since the Haze Outlook began in 2019 [2]. The only previous red-risk assessment occurred in 2023 [2].
Several environmental and economic factors are contributing to the threat. The return of El Niño and hot, dry weather have created conditions ripe for wildfires [1, 3]. Additionally, the institute said that increased deforestation, driven by the demand for biofuels, has heightened the risk [1, 3]. Economic and budget pressures are also cited as contributing factors to the instability [1].
The warning specifically highlights the vulnerability of Singapore, Indonesia, Malaysia, and Brunei [1, 3]. These nations frequently experience the effects of trans-boundary haze, which occurs when smoke from land-clearing fires in one country drifts across national borders.
Regional authorities are encouraged to coordinate prevention efforts before the peak risk period begins. The combination of climatic shifts and industrial land use continues to make the region susceptible to these seasonal atmospheric events [1, 2].
“The Singapore Institute of International Affairs has issued a red-risk rating warning of a high probability of severe trans-boundary haze.”
The issuance of a rare red-risk rating indicates a convergence of cyclical climate patterns and systemic land-use issues. By linking biofuel demand and economic pressures to deforestation, the report suggests that the haze is not merely a natural disaster but a byproduct of industrial expansion and global energy shifts. This puts pressure on ASEAN nations to synchronize their environmental regulations to prevent a regional health emergency.
