Why is the CNA haze trending in Singapore?
Hourly PM2.5 levels spiked to a very high 288 µg/m³ in the west, pushing the 24‑hour PSI into the unhealthy range nationwide. The surge triggered health advisories, outdoor activity bans and closures of sport facilities.
What happened
- Oct 14, 14:00 UTC
PM2.5 in western Singapore rose to 288, entering the very high band; NEA issued health advisory and SportSG closed outdoor centres [1]
- Oct 10, 2026
Indonesian officials described the forest fires as a natural phenomenon beyond human control and discussed joint response with Singapore and Malaysia [2]
What you need to know
When hourly PM2.5 exceeds 251, limit outdoor activities for the next hour.
Vulnerable groups (seniors, pregnant women, children) should stay indoors completely.
SportSG closed all outdoor and non‑air‑conditioned facilities in the west; SAFRA Toa Payoh suspended outdoor activities and closed its pool.
Dry conditions and ongoing hotspots in Kalimantan and Sumatra are sustaining the haze.
Exact contributions of specific fire sites to Singapore’s PM2.5 levels remain unclear, as cloud cover limited full assessment.
Background
Singapore’s NEA began publishing hourly PM2.5 data in 2014; readings above 251 µg/m³ are classified as very high and trigger health warnings. The 24‑hour PSI, which aggregates pollutants, was in the unhealthy band (114‑160) across all regions on Oct 14.
Transboundary haze originates from forest and land fires in Indonesia, especially in Kalimantan and Sumatra. Dry weather in the region, combined with prevailing east‑southeast to south winds, carries smoke into Singapore.
Indonesia’s government has framed the fires as a natural event beyond human error and is engaging with Singapore and Malaysia on joint mitigation, while also offering ground assistance rather than aerial response.
Questions people ask
What health measures should I follow during the haze?
Minimise outdoor activities for an hour when hourly PM2.5 is very high; vulnerable groups should stay indoors entirely.
Why are sport facilities closed?
SportSG closed outdoor and non‑air‑conditioned venues in the west to protect users from the elevated pollution levels.
Is the haze caused by Indonesian fires?
Yes, hotspots in Kalimantan and Sumatra are producing smoke that drifts over Singapore under prevailing winds.
Where this came from
[1] channelnewsasia.com
Singapore haze: Hourly PM2.5 reading surges to 288 in the west, enters very high band
Preview image from channelnewsasia.com
[2] mothership.sg
Indonesian govt official says forest fires 'beyond human error' & their forests 'send oxygen' if there's no haze
Preview image from mothership.sg
Found through Google Trends and drafted with AI from at least two cited sources. Published automatically after passing our automated checks for sources, wording and safety. It may not have been reviewed by a person yet. Report a correction.