Singapore haze alert: 3-hour PSI hits 'unhealthy' level
Southwesterly winds brought haze to Singapore on Monday.
The National Environment Agency's website on haze showed that the three-hour PSI reading at 3pm had risen to 125, within the "unhealthy" range of 101-200.
The 24-hour PSI was 65-72, in the moderate range.
In an update on the site at 2pm, NEA noted that it had been hazy in the city-state since the late morning, and air quality had deteriorated hence in most regions in Singapore.
"The haziness was due to smoke haze from a nearby source in central Sumatra, being blown in by the prevailing southwesterly winds," it said.
It added that, for the rest of the day, "the current hazy conditions are expected to persist, and the overall air quality is expected to be in the high end of the Moderate range".
