# Southeast Asian transboundary haze crisis

> Live situation record from CLSTR: https://clstr.news/situations/southeast-asian-transboundary-haze-crisis
> Updated: 2026-08-09T13:24:37.000Z. Sources: 7. Developments: 2.

Transboundary haze triggered by extensive forest and land fires in Kalimantan and Sumatra has led to deteriorating air quality in Malaysia. 

Initial reports indicated unhealthy Air Pollutant Index levels across five districts in Sarawak. In response, Malaysia activated national haze and open burning action plans, increasing patrols and initiating cloud-seeding operations. 

As the wildfires spread, including a significant blaze in Indonesia's Bromo Tengger Semeru National Park, the number of unhealthy areas in Sarawak expanded to eight districts. Unhealthy air quality was also recorded in Peninsular Malaysia, specifically in Selangor, as hot and dry weather continues to affect the region.

## Timeline

### 2026-08-09: Haze returns to Malaysia as Indonesian wildfires spread

Wildfires in Indonesia have triggered unhealthy haze levels across Malaysia, specifically impacting eight areas in Sarawak and parts of Selangor due to smoke drifting from Kalimantan and Sumatra.

3 sources. https://clstr.news/cluster/haze-returns-to-malaysia-as-indonesian-wildfires-spread

### 2026-08-07: Sarawak haze worsens as Kalimantan fires drive unhealthy air quality

Sarawak’s API spiked to unhealthy levels as Kalimantan fires in Indonesia caused 643 hotspots; Malaysia’s environment agency activated haze action plans, cloud‑seeding and school closures.

6 sources. https://clstr.news/cluster/sarawak-haze-worsens-as-kalimantan-fires-drive-unhealthy-air-quality

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Cite as: Southeast Asian transboundary haze crisis. CLSTR, https://clstr.news/situations/southeast-asian-transboundary-haze-crisis