Singapore is winding down its emergency response to regional smoke haze as improving weather patterns and a decline in transboundary haze activity lower the immediate risk to public health, Xinhua reported on Thursday.
The National Environment Agency (NEA) announced that several mitigation measures will conclude this weekend. Mask distribution at community clubs, public transport hubs, and other designated venues is scheduled to end at 6 p.m. local time on Saturday. Simultaneously, air-conditioned haze shelters located at community clubs and selected residents’ centers will also close at the same time on Saturday.
The easing conditions extend to the workforce and healthcare support systems. The Ministry of Manpower will lift haze-related precautions for outdoor workers starting Saturday, while the Ministry of Health will deactivate both the Public Health Preparedness Clinic Scheme and the Haze Subsidy Scheme on Nov. 12.
Weather shifts suppress regional smoke transport
The transition in air quality is being driven by a combination of changing wind patterns and increased precipitation. As of 7 p.m. local time on Thursday, Singapore’s 24-hour Pollutant Standards Index (PSI) sat between 56 and 64, placing it within the moderate range. One-hour PM2.5 readings remained in the normal range.
According to the NEA, showers and variable winds are expected to keep the haze suppressed through the weekend. This follows a period of significant atmospheric movement; Must Share News reported that between Oct. 16 and Oct. 28, the Meteorological Service Singapore (MSS) observed smoke haze being transported to the island by winds blowing primarily from the southeast or southwest. This specific wind pattern previously caused the 24-hour PSI to reach “unhealthy” levels for seven days and “very unhealthy” levels for three days.
The current improvement is linked to the onset of the inter-monsoon period. As noted by MSS, this period is characterized by light and variable winds, a departure from the persistent southeasterly or southwesterly winds seen during the Southwest Monsoon. These lighter winds make it less likely for smoke haze from regional hotspots to be transported toward Singapore. The inter-monsoon period typically brings increased showers and higher lightning activity, which further aids in clearing the air.
Monitoring air quality for outdoor activities
While the official mitigation measures are ending, health authorities emphasize that individual risk remains tied to personal health and activity intensity. AsiaOne.com reported that the NEA advises the public to check hourly PM2.5 readings before participating in outdoor activities, as the health impact depends on a person’s health status and the duration of exposure.
The following table outlines the recent and forecasted air quality trends reported by the NEA:
| Date/Period | PSI Range / Status | Contextual Detail |
|---|---|---|
| Oct. 16 – Oct. 28 | Unhealthy to Very Unhealthy | Driven by southeast/southwest winds. |
| Oct. 29 – Nov. 4 | Good to Moderate | Air quality remained in this range since 11 p.m. on Sunday. |
| Nov. 5 (Forecast) | 51 – 80 (Moderate) | Forecasted by the NEA. |
| Saturday (Forecast) | 51 – 70 (Moderate) | Forecasted by the NEA via AsiaOne.com. |
For those planning immediate outdoor movements, the NEA suggests using the haze microsite or the myENV mobile app to monitor real-time 1-hour PM2.5 concentrations. Channel News Asia (CNA) noted that when PM2.5 concentrations enter the elevated band, healthy individuals should reduce strenuous outdoor activities, while vulnerable groups—including children, the elderly, pregnant women, and those with chronic heart or lung conditions—should avoid such activities entirely.
Rainfall patterns and the inter-monsoon transition
The relief from haze is being bolstered by a shift toward wetter weather. Must Share News highlighted that during the second fortnight of October, most parts of the island recorded below-average rainfall, with the Tanjong Katong area seeing rainfall 72% below average. However, the approaching inter-monsoon period is expected to change this dynamic.
MSS forecasts that moderate to heavy thundery showers will occur over parts of the island on most days during the first two weeks of November. This increase in precipitation is expected to be “slightly above its long-term average” for most parts of the island, providing further respite from both haze and heat. While temperatures may still reach daily maximums between 33°C and 35°C, the increased moisture is expected to stabilize the regional environment.
The deactivation of the Haze Subsidy Scheme on Nov. 12 marks the final administrative step in the current mitigation cycle, as the region moves into a more stable meteorological phase.
