Better air quality today due to change in wind direction
AIR quality is expected to improve further today, according to the National Environment Agency (NEA), with the Pollutant Standards Index (PSI) forecast to be in the moderate range.
"For tomorrow, the prevailing winds are forecast to strengthen and blow from the south or south-east, and a further improvement in the air quality can be expected," NEA said last evening.
Thundery showers are also forecast for the late morning and early afternoon today.
But the agency advised people who are not feeling well, especially children and the elderly, and those with chronic heart or lung conditions, to seek medical attention.
The PSI was in the moderate to unhealthy range yesterday morning.
It dipped to the moderate range from 10am.
At 5am, the 24-hour PSI reading was between 69 and 105.
But this fell to between 67 and 89 at 6pm.
Many Singaporeans went ahead with their weekend outdoor activities yesterday, as the skies got clearer and the haze eased.
The Safra Singapore Bay Run & Army Half Marathon, held in Marina Bay yesterday morning, attracted a turnout of about 42,000 people.
Organisers had earlier said they would cancel the event if the three-hour PSI exceeded 200.
The launch event of the North West Life Saving Club, organised by North West Community Development Council in partnership with the Singapore Life Saving Society, also went on without a hitch at Choa Chua Kang Swimming Pool yesterday, attracting about 700 people.
The newly introduced one-hour PM2.5 concentration readings were in the normal range yesterday at 6pm in most regions, except the north, where it was 61.
Readings were 27 in the south, 25 in the west, 37 in the east and 25 in the central region.
The one-hour PM2.5 concentration is expected to stay in the "normal" band till at least this evening.
"During the haze season, the main air pollutant is PM2.5.
"One-hour PM2.5 concentration readings are a good indicator of the current air quality.
"Use this for immediate activities like going for a jog," said NEA.
The PSI crept into the unhealthy range for the first time this year on Friday, as westerly winds brought smoke from forest fires in Sumatra.
Air quality is considered unhealthy when the 24-hour PSI crosses 100.
Additional reporting by Jeremy Koh