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Hotspot surge in Kalimantan doubles as air quality deteriorates across region

Kalimantan has recorded a sharp spike in hotspots, more than doubling from previous levels, while air quality has degraded in ten areas across the Indonesian islands. Sumatra has also seen a significant jump in hotspot activity.

LSN Malaysia · 27 August 2026

Hotspot surge in Kalimantan doubles as air quality deteriorates across region

Hotspot activity in Kalimantan has surged dramatically, with detections reaching 520 points as of today, more than double the 254 recorded previously. The spike has coincided with a marked deterioration in air quality across ten locations in the region, raising concerns among environmental authorities and residents.

The situation has extended beyond Kalimantan, with Sumatra experiencing its own sharp increase in hotspots. Activity on the larger island jumped to 176 detections from just 12 previously, indicating a widening pattern of land-use changes and potential agricultural burning across multiple regions.

The simultaneous surge in hotspots across both major islands suggests widespread land-clearing activities ahead of the planting season. Such practices, while economically driven, release significant volumes of particulate matter into the atmosphere, degrading air quality across broader areas and affecting millions of residents.

Authorities in Indonesia have not yet issued formal statements regarding containment measures or investigations into the source of the hotspots. Regional air quality monitoring agencies have reported increasing concentrations of pollutants, particularly in zones downwind of active hotspot areas.