Haze readings rising - it hits 110 at 4pm after crossing into unhealthy range an hour earlier

The haze in Geylang on Sunday. The three-hour Pollutant Standards Index (PSI) inched upwards into the unhealthy range on Sunday afternoon, hitting 104 at 3pm. -- ST PHOTO: AZIZ HUSSIN 
The haze in Geylang on Sunday. The three-hour Pollutant Standards Index (PSI) inched upwards into the unhealthy range on Sunday afternoon, hitting 104 at 3pm. -- ST PHOTO: AZIZ HUSSIN 
Haze covering Bishan estate at 3.25pm on Sunday. The three-hour Pollutant Standards Index (PSI) inched upwards into the unhealthy range on Sunday afternoon, hitting 104 at 3pm. -- ST PHOTO: AZIZ HUSSIN 
Haze covering Bishan estate at 3.25pm on Sunday. The three-hour Pollutant Standards Index (PSI) inched upwards into the unhealthy range on Sunday afternoon, hitting 104 at 3pm. -- ST PHOTO: AZIZ HUSSIN 

SINGAPORE- The three-hour Pollutant Standards Index (PSI) inched upwards into the unhealthy range on Sunday afternoon, hitting 110 at 4pm.

The reading was 104 an hour earlier.

Two weeks ago, Singapore was also shrouded in haze with readings above 100, which is the unhealthy range, prompting people to start wearing masks.

If the 24-hour index hits the unhealthy band, the National Environment Agency (NEA) recommends that healthy people should reduce prolonged or strenuous outdoor physical exertion, while the elderly, pregnant women and children should minimise such exertion