The noon table from Sarawak’s Natural Resources and Environment Board (NREB) listed Lubok Antu at 191, Samarahan at 162, IPD Serian at 158, Sri Aman at 156 and Lundu at 142 — all in the unhealthy range. Tebedu and the other listed stations were moderate.

The number of unhealthy stations was unchanged from the morning reading, but the individual figures shifted during the day. API readings use a 24-hour running average of the dominant pollutant; 101 to 200 is classed as unhealthy and can worsen conditions for people with heart or lung complications.

Anyone planning a long period outdoors should check the latest APIMS reading first. People in high-risk groups should take extra care if the air turns smoky or the API rises further.