Air quality in Singapore on Tuesday entered unhealthy levels with the 24-hour Pollutant Standards Index (PSI) ranging from 91-106, the National Environment Agency (NEA) said.The NEA said the 24-hour PSI is expected to remain in the low to mid end of the unhealthy range for the next 24 hours and may further deteriorate if winds are unfavourable, the Today online reported.
As at 5pm (4pm Thailand time), the three-hour PSI was at 132.The 24-hour PSI first entered the high end of the moderate range (51-100) and low end of the unhealthy range (101-200) at 11am with a reading of 88-101.
In its 5pm haze update, the NEA said the hazy conditions are due to smoke haze from Sumatra island being blown in by the prevailing south-southwesterly winds. Thundery showers are forecast for Singapore on Wednesday morning.
Healthy persons are advised to reduce prolonged or strenuous outdoor physical activities.
The elderly, pregnant women and children should minimise prolonged or strenuous outdoor physical exertion, while those with chronic lung or heart disease should avoid prolonged or strenuous outdoor physical exertion.
People not feeling well, especially the elderly and children, as well as those with chronic heart or lung conditions should seek medical attention.