Singaporeans woke up to another day of haze on Tuesday as the Pollutant Standards Index (PSI) hovered at 121 at 10am.

The National Environment Agency released figures showing the country's air quality at 8am to be in the unhealthy range of 109-122. Anything above 100 is unhealthy. NEA figures showed the South region of Singapore to be the worst hit.

The haze was the worst in 16 years at 10pm on Monday, with a PSI reading of 155, before dipping slightly to 145 at midnight.

Concerned readers of The Straits Times have sent their photos in showing Singapore, from Tanjong Pagar to Jurong East Central, shrouded in smog.

Reader Yap Siew Meng, who sent in a photo montage taken on Monday, said that the haze was so bad that he could not open his eyes fully.

Urged reader Joanne Hong: "The Government needs to do something. This is very bad for our children.