Extreme wildfires expected to increase 30% by 2050: Study

The consequences of extreme fires are wide-ranging, from loss and damage to costly firefighting response. PHOTO: REUTERS

LONDON (REUTERS) - Indonesia's peatlands, California's forests, and now, vast swathes of Argentine wetland have all been ravaged by extreme wildfires, heralding a fiery future and the dire need to prevent it.

With climate change triggering droughts and farmers clearing forests, the number of extreme wildfires is expected to increase 30 per cent within the next 28 years. And they are now scorching environments that were not prone to burning in the past, such as the Arctic's tundra and the Amazon rainforest.

"We've seen a great increase in recent fires in northern Syria, northern Siberia, the eastern side of Australia, and India," said Australian government bushfire scientist Andrew Sullivan, an editor on the report, released on Wednesday, by the United Nations Environment Programme (UNEP) and GRID-Arendal environmental communications group.

At the same time, the slow disappearance of cool, damp nights that once helped to temper fires also means they are getting harder to extinguish, according to a second study published last week in the journal Nature.

With night-time temperatures rising faster than day-time ones over the last four decades, researchers found a 36 per cent increase in the number of after-dark hours that were warm and dry enough to sustain fire.

"This is a mechanism for fires to get much bigger and more extreme," said Dr Jennifer Balch, lead author of the Nature study and director of the University of Colorado Boulder's Earth Lab.

"Exhausted firefighters don't get relief," which means they cannot regroup and revise strategies to tackle a blaze.

The consequences of extreme fires are wide-ranging, from loss and damage to costly firefighting response.

In the United States alone, the UNEP report said the economic burden of wildfire totals as much as US$347 billion (S$467 billion) annually.

With California's forests ablaze, the state government spent an estimated $3.1 billion on fire suppression in the 2020 to 2021 fiscal year.

The fires raging since December last year in Argentina's Corrientes province have taken an enormous toll, killing Ibera National Park wildlife, charring pasturelands and livestock, and decimating crops including yerba mate, fruit and rice.

Losses already have exceeded 25 billion Argentine pesos (S$314 million), said The Argentine Rural Society.

The UNEP report calls on governments to rethink wildfire spending, recommending they put 45 per cent of their budget towards prevention and preparedness, 34 per cent towards firefighting response, and 20 per cent for recovery.

"In many regions of the world, most resources go towards response - they focus on the short term," said Mr Paulo Fernandes, a contributing author of the UNEP report and fire scientist at Universidade of Tras-os-Montes and Alto Douro in Portugal.

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