Malaysia declares emergency in Sarawak as hazardous haze forces school closures

KUALA LUMPUR — On September 4, the Malaysian government announced a state of emergency for the Serian Division of Sarawak, the eastern Malaysian state on Borneo, after air‑quality readings from the Department of Environment rose to hazardous levels. The emergency, declared by the Sarawak state authorities, triggered the immediate closure of 647 schools across the division and authorized the deployment of emergency response teams to distribute masks, provide medical assistance and enforce temporary restrictions on outdoor activities.

The deteriorating haze originates from a series of forest and peatland fires in Kalimantan, the Indonesian portion of Borneo, where slash‑and‑burn practices for land clearing have ignited widespread smoldering. Prevailing winds have carried the smoke across the international border into Sarawak, where the particulate matter (PM2.5) concentration surpassed the 150 µg/m³ threshold defined by Malaysia’s National Ambient Air Quality Standard as “hazardous”. The emergency order, which remains in force for 14 days, gives authorities the power to mobilise additional health resources, suspend non‑essential public gatherings and, if needed, restrict vehicular traffic in the most affected districts.

Malaysia’s response reflects a pattern that has unfolded repeatedly over the past two decades. The country’s geography makes it vulnerable to trans‑boundary haze: Peninsular Malaysia lies opposite Indonesia’s Sumatra, while East Malaysia shares the island of Borneo with Indonesia’s Kalimantan provinces and the small nation of Brunei. Historically, large‑scale agricultural expansion, particularly for oil‑palm plantations, has driven the use of fire to clear land. When rains fail or winds shift, the resulting smoke spreads across the narrow sea channels that separate the two nations, creating health crises that affect millions of residents and strain local economies.

The federal government, through the Ministry of Environment and Water, has repeatedly urged Indonesia to enforce stricter fire‑prevention measures and to strengthen monitoring of illegal land‑clearing activities. Indonesian officials, meanwhile, have pointed to the challenges of policing vast, remote peatlands and the involvement of small‑scale farmers who lack alternatives to traditional slash‑and‑burn techniques. Both countries are signatories to the 2002 ASEAN Agreement on Trans‑Boundary Haze Pollution, which obliges member states to cooperate on prevention, monitoring and mitigation, yet implementation has been uneven. In recent weeks, Indonesia’s Ministry of Environment and Forestry has dispatched additional fire‑fighting crews and aircraft to Kalimantan, while also pledging to accelerate the rollout of community‑based fire‑prevention programmes.

Local reactions in Sarawak have been mixed. Residents and business owners in the Serian Division, a largely agricultural area, expressed frustration at the recurring health impacts and the disruption to schooling and commerce. Health officials warned that prolonged exposure to high‑level haze can exacerbate respiratory conditions, cardiovascular disease and eye irritation, particularly among children and the elderly. NGOs operating in the region have called for greater transparency in air‑quality reporting and for a coordinated regional response that includes compensation for affected communities.

The declaration of emergency underscores the broader implications of the haze for Southeast Asia’s environmental and economic stability. Air‑quality degradation hampers productivity, deters tourism and raises public‑health expenditures, while the underlying driver—unsustainable land‑use practices—poses a long‑term threat to the region’s biodiversity and carbon‑sequestration capacity. For Malaysia, the emergency also highlights the limits of national authority in confronting a problem that originates beyond its borders, reinforcing the need for stronger cross‑border enforcement mechanisms and shared investment in fire‑prevention technology. As the haze season continues, the situation in Serian serves as a reminder that climate‑related trans‑boundary challenges demand coordinated policy action, not only to protect public health but also to safeguard the economic interdependence of the ASEAN community.