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.