Authorities assure conditions will clear as wind patterns shift during the day

A hazy skyline greeted Singaporeans on the morning of 26 March, with experts attributing the phenomenon to the accumulation of particulate matter under light wind conditions.

According to the National Environment Agency (NEA), the situation is expected to improve later in the day as winds pick up strength. Singapore is currently experiencing the northeast monsoon, with prevailing winds coming from the northwest or northeast.

Despite an increase in hotspots and haze in the Mekong sub-region, satellite data does not indicate that smoke from neighbouring countries is reaching Singapore. The affected region, which includes Myanmar, Thailand, Vietnam, Laos, and Cambodia, has seen persistent dry weather contributing to worsening haze conditions.

The ASEAN Specialised Meteorological Centre (ASMC) previously warned on 17 March of a heightened risk of transboundary haze due to ongoing dry conditions and increased hotspot activity. Recent satellite images recorded over 2,000 hotspots in the Mekong sub-region on 15 and 16 March, significantly higher than figures observed at the start of the dry season in January.

As of 2pm, Singapore’s 24-hour Pollutant Standards Index (PSI) readings ranged between 63 and 77, the highest recorded since mid-January. The PSI measures air quality based on six pollutants, including PM2.5, the dominant pollutant in haze periods. Readings between 51 and 100 indicate moderate air quality, while levels above 100 are considered unhealthy.

A Singapore resident, who identified himself only as Chong, said he first noticed the hazy conditions a few days ago. “At first, I thought my glasses were foggy,” said the 35-year-old tuition teacher. “Then I realised the skies were hazy after seeing discussions online. If it worsens, I’ll stay indoors with the air-conditioning on.”

NEA continues to monitor air quality and will provide updates if necessary. Meanwhile, ASMC warns that unless weather conditions improve, haze and hotspot activity in the region are likely to intensify.