As at noon Thursday (Aug 16), the air quality was at unhealthy levels in Kangar (Perlis); Alor Setar and Sungai Petani (Kedah); Seberang Jaya and Seberang Perai (Penang); and Mukah.
The worst so far is Alor Setar, which had a reading of Air Pollutant Index (API) level at 157, according to the Air Pollutant Index of Malaysia.
According to the readings, the air quality in several areas started to climb from green or moderate (where the API is between 51-100) to yellow, or unhealthy (101-200), from Wednesday (Aug 15).
Kuala Lumpur is still in the green, though, with an API of between 65 (Cheras) and 67 (Batu Muda).
Petaling Jaya also recorded a moderate API reading of 63.
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