Indonesia is facing another serious environmental crisis as widespread forest and peatland fires continue across parts of the country, producing large quantities of smoke and creating concerns about air quality, public health, ecosystems and regional pollution.

The fires are particularly affecting areas of Sumatra and Borneo, where dry conditions have allowed flames to spread across forests and peatlands. The resulting haze is not remaining within Indonesia’s borders. Atmospheric conditions are carrying smoke toward neighbouring parts of Southeast Asia, raising concerns in Malaysia, Singapore, Brunei and other nearby areas.

The latest episode highlights the continuing difficulty of controlling land and forest fires in tropical regions where peat-rich landscapes can burn for extended periods and become extremely difficult to extinguish.

Peatlands Make the Fires Especially Difficult to Control

One of the most challenging aspects of Indonesia’s fires is the presence of extensive peatlands.

Peat consists of layers of partially decomposed organic material that have accumulated over long periods in waterlogged environments. When peatlands remain wet, they can store large quantities of carbon and act as important ecosystems.

But when peat dries out, it can become highly combustible.

Unlike an ordinary surface fire that can sometimes be stopped after vegetation is extinguished, peat fires may continue burning underground. Flames can move beneath the surface and reappear considerable distances away, making detection and firefighting significantly more difficult.

This characteristic also means that a fire can continue producing smoke even when visible flames appear limited.

Smoke Creates a Regional Problem

The environmental consequences extend beyond the immediate fire zones.

Smoke contains a complex mixture of gases and fine particles. Small airborne particles can travel deep into the respiratory system and reduce air quality when concentrations become elevated.

When winds carry the haze across national boundaries, the issue becomes regional rather than purely domestic.

Neighbouring countries can experience hazy skies, reduced visibility and deteriorating air quality even though the fires themselves are located hundreds of kilometres away.

This cross-border dimension has historically made Southeast Asian forest-fire pollution an important regional environmental issue.

Indonesia’s Forest Fire Challenge Is Complex

It would be misleading to view every forest fire as having one single cause.

Some fires occur naturally under particular weather conditions, while others are associated with human activities such as land clearing, agricultural practices and accidental burning. In areas where vegetation has been degraded or land has been drained, the risk can become considerably higher.

Peatland drainage is particularly important because lowering the water table can make peat substantially more vulnerable to ignition.

Once fire enters a dry peat landscape, suppression becomes much more complicated.

Climate Conditions Can Intensify Fire Risk

Climate change adds another layer to the problem.

A warmer climate can influence rainfall patterns, evaporation and the duration of dry periods. When vegetation and peatlands remain dry for longer periods, the environmental conditions become more favourable for fire ignition and rapid spread.

However, climate change should not be treated as the sole explanation for a particular fire outbreak. Local land management, human activity, rainfall variability, vegetation conditions and weather patterns can all influence the development of individual fire events.

The interaction between these factors is what makes the long-term risk particularly difficult to manage.

Biodiversity Faces Serious Pressure

Indonesia’s forests contain some of the world’s most important tropical ecosystems.

Sumatra and Borneo support numerous species and provide habitat for wildlife that depends on increasingly fragmented forest landscapes.

Repeated fires can destroy vegetation, degrade habitats and alter ecological conditions. Animals may be forced to move away from burning areas, while surviving habitats can become more fragmented.

Fire can also damage the ability of forests to recover, particularly when repeated burning occurs in the same landscape.

The consequences therefore extend well beyond the immediate period when smoke is visible.

Carbon Emissions Add to the Climate Problem

Forest and peat fires have another major consequence: carbon emissions.

Trees and other vegetation store carbon. Peatlands can store particularly large quantities of carbon accumulated over centuries or even millennia.

When these ecosystems burn, some of that stored carbon is released into the atmosphere.

This creates a difficult cycle. Environmental degradation and drying can increase fire vulnerability, while fires release greenhouse gases that contribute to global warming.

The climate impact is therefore not limited to the smoke produced during the event.

Public Health Becomes a Major Concern

Air pollution from major fires can affect people far from the burning areas.

Fine particulate matter is particularly concerning because of its ability to enter deep into the lungs. During severe haze events, people may experience irritation of the eyes and throat, coughing and breathing difficulties.

People with existing respiratory vulnerabilities, young children and older adults can be especially sensitive to poor air quality.

Consequently, authorities may need to issue health advisories, adjust outdoor activities and increase monitoring when smoke concentrations rise.

Economic Costs Can Spread Across Borders

Forest fires can also create substantial economic disruption.

Agriculture, tourism, transportation and outdoor businesses can all be affected by prolonged haze. Poor visibility can interfere with aviation and road transportation, while unhealthy air can reduce outdoor activity.

Local communities may additionally face losses when agricultural land, forests or other resources are damaged.

At the regional level, the economic consequences become harder to calculate because pollution can cross international borders.

Prevention Is More Important Than Firefighting Alone

The latest fires again underline the importance of prevention.

Rapid detection systems can help authorities identify new fires before they become widespread. Maintaining healthy water levels in peatlands can reduce their vulnerability, while responsible land-use practices can lower ignition risks.

Fire prevention also requires cooperation with local communities.

People living near forests and agricultural areas often have the most direct knowledge of changing conditions. Effective policies therefore need to combine satellite monitoring, enforcement, land management and community participation.

A Warning for a Warming Region

Indonesia’s latest fire crisis demonstrates how environmental, climatic and human factors can combine to create a regional emergency.

The immediate challenge is controlling active fires and reducing dangerous smoke exposure. The longer-term challenge is preventing landscapes from becoming increasingly vulnerable to repeated burning.

Protecting forests and restoring degraded peatlands could help reduce both fire risk and carbon emissions, while stronger regional cooperation could improve responses when smoke crosses national boundaries.

As Southeast Asia faces changing climate conditions, the management of forests and peatlands will become increasingly important. Indonesia’s current fires are therefore not simply a seasonal environmental problem; they highlight the broader challenge of protecting tropical ecosystems while reducing the risks created by extreme dryness, land degradation and human-caused ignition.