Indonesia’s wildfire haze reaches hazardous levels across parts of Southeast Asia
Wildfires on Indonesia’s Borneo and Sumatra islands have produced toxic cross-border haze. Malaysia and Singapore have reported hazardous or unhealthy air, with school closures and emergency measures in affected areas.
By DoomRadar · Published on DoomRadar . Updated .
Places in the report
Countries named in the cited reporting. Highlighting does not show the area affected. Map: Natural Earth.
Event timeline4 Sep → 14 Sep
Dates stated in the reported details, separate from article publication times.
- 4 Sep
Singapore began issuing haze advisories on September 4 after its 24-hour Pollutant Standards Index reached unhealthy levels; its haze task force introduced mitigation measures.
[2] · Reported detail - 14 Sep
FireWatch detected more than 617,400 potential fire hotspots in Indonesia by September 14, over twice the number recorded during the same period in 2019.
[2] · Reported detail
How the effects could reach youConditional effects
What happened
At least 895,657 hectares have burned across Indonesia since January, 34% more than in 2019, according to Nusantara Atlas data cited by the Guardian and AOL. [1][3]
References for this detail (2)
- 'The physical toll is visceral': How Indonesia's fire haze affects millions - visual guide | Indonesiatheguardian.com · Recorded source date: Sep 21, 2026, 3:31 AM UTC
- 'The physical toll is visceral': How Indonesia's fire haze affects millions - visual guideaol.co.uk · Recorded source date: Sep 21, 2026, 4:46 AM UTC
Malaysia declared a state of emergency in Serian, a border district south of Kuching, and nearly 200,000 students in Sarawak moved to online learning. [2]
References for this detail (1)
- Indonesia's wildfire haze blankets Southeast Asia | News | Eco-Businesseco-business.com · Recorded source date: Sep 21, 2026, 6:17 AM UTC
Singapore began issuing haze advisories on September 4 after its 24-hour Pollutant Standards Index reached unhealthy levels; its haze task force introduced mitigation measures. [2]
References for this detail (1)
- Indonesia's wildfire haze blankets Southeast Asia | News | Eco-Businesseco-business.com · Recorded source date: Sep 21, 2026, 6:17 AM UTC
FireWatch detected more than 617,400 potential fire hotspots in Indonesia by September 14, over twice the number recorded during the same period in 2019. [2]
References for this detail (1)
- Indonesia's wildfire haze blankets Southeast Asia | News | Eco-Businesseco-business.com · Recorded source date: Sep 21, 2026, 6:17 AM UTC
Context from the sources
The fires are sometimes deliberately started to clear land for plantations, while hot and dry conditions can allow smaller blazes to spread. [1][3]
Malaysia has urged ASEAN to review its 2003 agreement on transboundary haze. [1][3]
Explore the sources and reporting timeline
3 source links · 3 domains
These counts describe the references, not independent confirmations. Different outlets can repeat the same original report.
Source timeline
Oldest to newest among the available source dates, not a chronology of the incident. Article publication dates come from the source; other recorded dates may reflect when a link was found.
- [1] 'The physical toll is visceral': How Indonesia's fire haze affects millions - visual guide | Indonesiatheguardian.comReferenced for: detail 1
- [3] 'The physical toll is visceral': How Indonesia's fire haze affects millions - visual guideaol.co.ukReferenced for: detail 1
- [2] Indonesia's wildfire haze blankets Southeast Asia | News | Eco-Businesseco-business.comReferenced for: detail 2, detail 3, detail 4
What this could mean for you
Breathing conditions and outdoor activities may worsen for residents in affected areas.
Smoke from Indonesian fires crosses borders and produces unhealthy or hazardous air.
Reported basis: [1][2] · The possible effect is interpretation.
Depends on: Fires continue and winds carry smoke into populated areas.
Possible time frame: days, if those conditions hold.
Some students and workers may need remote arrangements or face disrupted routines.
Authorities may close schools or introduce mitigation measures when air quality becomes hazardous.
Reported basis: [2] · The possible effect is interpretation.
Depends on: Air-quality readings remain at emergency or hazardous levels.
Possible time frame: days, if those conditions hold.
Possible consequences, not a forecast. Their relevance depends on your location and the conditions above.
For your country
Choose a country to check how this event could affect you.
What changes the outlook
Risk increases if…
Continued hot, dry conditions and additional fires would increase smoke emissions.
Persistent cross-border haze could lead to further school closures or emergency declarations.
Pressure eases if…
Rain or fire suppression reducing active burns would lower smoke emissions.
Improved air quality could allow schools and normal outdoor activities to resume.
Still unclear
How long hazardous air conditions will persist in each affected area.
Whether the reported fires and hotspots will continue to increase or decline.
Market implications
Market impact
Sources (3)
References for the reported details. Separate links do not necessarily mean independent confirmation.
Available excerpt
Intensified by this year’s super El Niño, fires in Borneo and Sumatra are emitting toxic air for swathes of the population in Indonesia and its…A short excerpt from our source record; open the original for the full article.
Available excerpt
Air quality in cities and districts across Southeast Asia has reached hazardous levels in recent weeks owing to transboundary haze from wildfires in Indonesia. Video…A short excerpt from our source record; open the original for the full article.
Available excerpt
For months, parts of Indonesia’s Borneo and Sumatra islands have been ablaze. The fires are sometimes lit illegally as a cheap way to clear land…A short excerpt from our source record; open the original for the full article.
First tracked by DoomRadar: . AI-assisted analysis · . Based on linked headlines and available excerpts. Methodology · Report an error.