Singapore records highest 2026 air pollution reading as Indonesian haze spreads

Singapore recorded its highest air-pollution reading of 2026 on Wednesday as smoke from Indonesian wildfires pushed one-hour PM2.5 concentrations to roughly 288 micrograms per cubic metre, well above levels considered hazardous.

The National Environment Agency said the haze had intensified with prevailing winds carrying particulates from peat and forest fires in Sumatra and Kalimantan. Visibility dropped in parts of the city-state, and health authorities advised vulnerable groups to remain indoors and limit outdoor activity. Similar conditions affected parts of Malaysia and southern Thailand.

In Timor-Leste, the government suspended in-person classes nationwide from 15 to 17 October because of the deteriorating air quality. Officials cited elevated pollutant levels and the risk to schoolchildren. Neighbouring countries have also issued health alerts as the annual dry-season burning season coincides with reduced rainfall.

Indonesian authorities have deployed additional firefighting resources and called for stricter enforcement against illegal burning. Peatland fires are particularly difficult to extinguish once they take hold underground and can smoulder for weeks, releasing large volumes of fine particulates. Satellite data from regional monitoring centres showed dozens of hotspots in the main fire-prone provinces.

The 2026 haze event is the most severe so far this year for Singapore. Previous peaks have triggered diplomatic exchanges and joint efforts under the ASEAN Agreement on Transboundary Haze Pollution. Progress on peatland restoration and alternative livelihood programmes has been uneven, and dry conditions linked to broader climate patterns have again favoured fire spread.

Air-quality readings are expected to fluctuate with wind direction over the coming days. Residents in affected cities have been advised to use masks rated for fine particles and to monitor official indexes. The episode again illustrates the persistent cross-border impact of land-clearing fires in the region.