Readings at 6am put Lundu at API 329 and Serian at 303. Kuching was at 241, with Samarahan at 239, Tebedu at 242, Sri Aman at 230 and Lubok Antu at 212 — all in the very unhealthy range.

The latest figures mark a sharp deterioration from Monday: Lundu had been at 260 at noon, while Serian rose from 222 to 303. Other stations, including Sarikei, Sibu, Mukah, Bintulu, Miri and Betong, remained unhealthy.

Kapit and Limbang were below 100, while Bario recorded 38. Air quality can change through the day, so people in affected areas should check the latest official API reading before planning prolonged outdoor activity, especially for children, older people and those with breathing problems.