SINGAPORE - Singapore's air quality improved on Friday, and only occasional, slight haze is expected for Saturday, the National Environment Agency (NEA) said on Friday evening.

"Given the air quality forecastfor the next 24 hours, everyone can continue with normal activities," the NEA said. "People who are not feeling well, especially the elderly and children, and those with chronic heart or lung conditions, however, should seek medical attention."

It added that the 24-hour Pollutant Standards Index, which indicates the air quality here, is expected to be in the moderate range of 51 to 100 on Saturday. Air becomes unhealthy when the index crosses 100.

The agency added that thundery showers are also expected in the late morning and early afternoon. For more updates, go to www.nea.gov.sg, www.haze.gov.sg, or the NEA's Facebook or Twitter pages.