Strong El Niño Could Increase Wildfire Threat Across Multiple Continents, Scientists Warn

Rome — Climate experts are warning that a powerful El Niño event could significantly elevate wildfire risks across large parts of South America, Southeast Asia, and eastern Australia, with some of the most severe consequences potentially emerging long after the climate phenomenon itself begins to weaken. Researchers emphasize that the delayed effects of reduced rainfall can leave forests, grasslands, and other ecosystems dangerously dry, creating ideal conditions for intense and difficult-to-control wildfires during the following fire season.

El Niño is a naturally occurring climate pattern that develops when sea surface temperatures in the central and eastern Pacific Ocean become warmer than average. Although it originates over the Pacific, its influence extends across the globe, altering rainfall, temperature patterns, and weather systems in many regions. These shifts often affect agriculture, water availability, biodiversity, and disaster risk.

One of the most significant concerns linked to a strong El Niño is the prolonged reduction in rainfall experienced by many tropical and subtropical regions. Lower precipitation means that forests receive less moisture over an extended period, causing vegetation, leaf litter, and fallen branches to dry out. As this dry material accumulates, it becomes highly combustible, allowing even small ignition sources to trigger large-scale wildfires.

Scientists explain that the greatest wildfire danger may not occur during the peak of El Niño itself but in the months that follow. Forest ecosystems often require considerable time to recover after extended dry periods. Even when seasonal rains eventually return, vegetation and soils may remain moisture-deficient, leaving landscapes vulnerable to fire well into the next dry season.

In South America, prolonged drought conditions could increase wildfire risks in several forested and savanna regions. Fires in these ecosystems not only threaten wildlife and local communities but also release vast quantities of carbon dioxide into the atmosphere, reducing the ability of forests to absorb greenhouse gases and contributing further to global climate change.

Across Southeast Asia, reduced rainfall may heighten the likelihood of forest and peatland fires. Peat-rich landscapes are especially vulnerable because underground fires can burn for weeks or even months, producing dense smoke that affects air quality across national borders. Such events can disrupt transportation, impact public health, and damage fragile ecosystems.

Meanwhile, eastern Australia may also experience heightened wildfire risks as drier conditions reduce soil moisture and stress native vegetation. Australia’s bushfire history has shown that prolonged drought combined with high temperatures, strong winds, and low humidity can create conditions for rapidly spreading fires that threaten both natural environments and populated areas.

Climate specialists stress that wildfire risk is influenced by multiple interacting factors, including weather conditions, vegetation health, land management practices, and human activities. While El Niño increases the probability of drought in many regions, effective forest management, early warning systems, fire prevention programs, and rapid emergency response remain essential tools for reducing the overall impact of wildfires.

Experts also emphasize the importance of monitoring forests throughout the year rather than focusing only on active fire seasons. Satellite observations, climate forecasting, and improved environmental monitoring allow authorities to identify vulnerable areas before fires begin, enabling governments and local communities to prepare more effectively.

The agricultural sector may also face indirect consequences. Extended dry periods can reduce crop yields, limit water supplies for irrigation, and increase pressure on rural livelihoods. Livestock producers may encounter shortages of pasture and water, while communities dependent on forest resources could experience additional economic challenges if fires damage natural ecosystems.

Environmental organizations continue to encourage countries to strengthen climate adaptation strategies by investing in sustainable forest management, restoring degraded landscapes, improving firefighting capacity, and expanding regional cooperation on wildfire prevention. Public awareness campaigns and community preparedness initiatives are also considered critical for reducing accidental fire outbreaks during high-risk periods.

As climate variability continues to influence weather patterns worldwide, scientists believe that understanding the long-term impacts of El Niño is becoming increasingly important. Preparing for delayed wildfire risks—not just immediate weather changes—can help governments, emergency agencies, and local communities protect lives, preserve biodiversity, and strengthen resilience against future climate-related disasters.