Indonesian forecast warns pollutants moving from Kalimantan, Sumatra fires towards Malaysia and Singapore

: Admin UKK; Berita; 02 September 2026

JAKARTA, Sept 1 — Pollutants from fires in Indonesia’s Sumatra and Kalimantan are continuing to move towards the Strait of Malacca and Natuna Sea, and potentially towards Malaysia, Singapore and Brunei, according to a forecast presented by Indonesian authorities on Tuesday.

The forecast by Indonesia’s Meteorology, Climatology and Geophysics Agency (BMKG) came as fire spots declined sharply across priority provinces in Kalimantan and remained relatively low in Sumatra on Tuesday, although severe air pollution persisted in parts of both islands.

National Disaster Mitigation Agency (BNPB) Acting Head of Data, Information and Disaster Communication Centre Berton Panjaitan said Central Kalimantan recorded the highest number at 63, down from 72 a day earlier, while West Kalimantan fell to 30 from 104 and South Kalimantan to 13 from 55.

According to data displayed during the press conference, air pollution remained severe in parts of Kalimantan, with the Air Pollutant Standard Index (ISPU) reaching 680 in Katingan, Central Kalimantan, 468 in Southeast Pontianak, West Kalimantan and 405 in Murung Raya, Central Kalimantan, as of 4.09 pm local time.

“Visibility remained below one kilometre in West Kalimantan, about two kilometres in Central Kalimantan and below three kilometres in South Kalimantan,” Berton said.

In Sumatra, he said air quality had improved, particularly in Riau and Jambi, while conditions in South Sumatra were generally moderate, though visibility there remained below two kilometres.

“Normal activities, including face-to-face learning, have continued in Riau, with visibility improving to more than nine kilometres. Car Free Day was also held last Sunday, which shows that air quality, particularly in Pekanbaru, has improved. We hope these conditions will continue,” he said.

Berton said ground teams had extinguished fires covering about 263 hectares in West Kalimantan, 87 hectares in Central Kalimantan and 29 hectares in South Kalimantan. In Sumatra, the figures were more than 126 hectares in Riau, 13 hectares in Jambi and 9.25 hectares in South Sumatra as of Monday.

“Even after the fire has been extinguished, the work is not over, as the area still has to be wetted and cooled until there is no remaining heat. Peatland fires pose extraordinary challenges compared with vegetation fires on mineral soil,” he said.

Regarding weather modification operations, Berton said light to moderate rain was observed in parts of Jambi after 2,000 kilogrammes of salt were dispersed, while an operation in Central Kalimantan failed to produce rain.

Similar efforts could not be conducted in Riau, South Sumatra and South Kalimantan due to a lack of suitable clouds, he said. — Bernama

Berita

Indonesian forecast warns pollutants moving from Kalimantan, Sumatra fires towards Malaysia and Singapore