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Southeast Asian haze crisis

Factlen Newsroom· Updated

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Thick transboundary haze from Indonesian peatland fires obscures the Singapore skyline, prompting legal action from local authorities.From: Singapore Weighs Legal Action Against Indonesian Firms as Wildfire Haze Turns Deadly

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By 09:33 UTC on October 19, conservation teams reported the evacuation of at least 51 critically endangered orangutans from burning forests across West Kalimantan in Indonesian Borneo. The severe regional pollution crisis has blanketed Indonesia, Malaysia, and Singapore in toxic smoke, resulting in closed schools and grounded flights.

The human toll of the crisis expanded, claiming the lives of four firefighters in Indonesia amid a surging demand for air purifiers.

By 08:35 UTC on October 20, Singapore issued preventive legal notices to multiple Indonesian companies under its Transboundary Haze Pollution Act. The action risks diplomatic friction but signals a shift toward holding foreign entities financially liable for cross-border environmental damage.

How the story developed

The crisis began escalating in early August as intense El Niño conditions and the burning of carbon-rich, drained peatlands fueled wildfires across Indonesia. The hazardous air quality exposed more than 12.5 million people across seven Indonesian provinces.

Between September 1 and September 9, acute respiratory infections in Indonesia surged from 50,891 to 113,336 cases. Children under five accounted for more than 20 percent of the recorded illnesses.

Companies found guilty under the Transboundary Haze Pollution Act face fines capped at S$2 million.From: Singapore Weighs Legal Action Against Indonesian Firms as Wildfire Haze Turns Deadly ·

The transboundary smoke began spreading outward, initially affecting air quality in neighboring Malaysia. As the blazes destroyed vital habitats, critically endangered orangutans were forced into agricultural plantations, overwhelming wildlife rescue centers.

On October 8, eight rehabilitated orangutans were successfully released into a protected forest. The release freed up necessary space in the facilities handling the displaced apes.

Rescue centers have seen a sharp influx of displaced orangutans as the dry season fires intensify.From: Dozens of Orangutans Rescued from Indonesian Wildfires as Toxic Haze Blankets Region ·

What to watch

  • Authorities are actively investigating whether Singapore-based companies are linked to the affected Indonesian peatlands.
  • Indonesian firms found guilty of contributing to the transboundary smoke face fines of up to S$2 million.

Charts, maps and images

Respiratory infections in fire-affected regions more than doubled in early September.From: Indonesian Peat Fires Double Respiratory Infections to Over 113,000 as Haze Spreads ·
Illustration: Indonesian firefighters battle underground peatland blazes, which are exceptionally difficult to extinguish without sustained rainfall.From: Singapore Weighs Legal Action Against Indonesian Firms as Wildfire Haze Turns Deadly ·
The influx of particulate matter has driven a surge in demand for N95 masks and air purifiers across affected urban centers.From: Singapore Weighs Legal Action Against Indonesian Firms as Wildfire Haze Turns Deadly ·
Illustration: The Indonesian wildfires have triggered a severe regional pollution crisis, blanketing neighboring countries in toxic haze.From: Dozens of Orangutans Rescued from Indonesian Wildfires as Toxic Haze Blankets Region ·
Illustration: Rehabilitated orangutans are being released into protected reserves that have escaped the seasonal blazes.From: Dozens of Orangutans Rescued from Indonesian Wildfires as Toxic Haze Blankets Region ·
The Indonesian Health Ministry has mobilized over 19,000 health workers to manage the surge in respiratory cases.From: Indonesian Peat Fires Double Respiratory Infections to Over 113,000 as Haze Spreads ·

Timeline

October 2026

  1. Singapore Weighs Legal Action Against Indonesian Firms as Wildfire Haze Turns Deadly
  2. Dozens of Orangutans Rescued from Indonesian Wildfires as Toxic Haze Blankets Region

September 2026

  1. Indonesian Peat Fires Double Respiratory Infections to Over 113,000 as Haze Spreads