Haze Update: Air quality in Singapore improved on the morning of 25 October, with hourly PM2.5 readings returning to "normal" for 3 zones, even as 24-hour PSI levels remained in the "unhealthy" band across the island.

Haze Update: Air quality in Singapore improved on the morning of 25 October, with hourly PM2.5 readings returning to "normal" for 3 zones, even as 24-hour PSI levels remained in the "unhealthy" band across the island.