Chile Foresees More Wildfires Due to High Winds, Low Humidity, Plantation Forests
Chile’s government expects the area burned by wildfires to double this year, the country’s agriculture minister said last Tuesday morning, as flames continued to rage through the heart of the country amid a heat wave.
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Chile is scheduled to host this year’s United Nations climate change conference, COP 25, toward the end of this year.
“We are expecting 70,000 hectares to burn [from 1 July 2018 until 1 July 2019] on the basis of high temperatures, quite strong winds, and comparatively low humidity,” Efe Verde reported agriculture minister Antonio Walker said. “There are also many combustibles, many pastures.”
That figure is double the 35,000 hectares burnt during the last period of 1 July 2017 to 1 July 2018. In the season before, the worst in Chile’s history, around 600,000 hectares were burned.
This year’s “weather forecast is very favourable to wildfires,” Walker said.
But Ramon Vallejo, a scientist specializing in fire ecology at the University of Barcelona, said the government’s figures should be taken with a pinch of salt.
“I wouldn’t call it a forecast. A forecast is when we say that it will rain next week because we have the maps and the pressure and we know what is going to happen. In this case, it is a kind of projection,” he said.
Vallejo said the government warning was likely designed to prompt people to behave responsibly at the start of the Chilean summer.
It was impossible to directly attribute the increasing severity of the country’s wildfires to climate change, Vallejo said, but global warming does create condition that favour blazes. Droughts lead to stressed, dry vegetation which in turn becomes fuel for fires.
More than 250 wildfires in Chile have been recorded since January 1, affecting 4,584 hectares. Out of those, two particularly aggressive ones continue to progress in Valparaiso, a region located to the north of Santiago. A red alert has been declared in the commune of Santo Domingo, where fire has eaten through 1,840 hectares.
Head of the national board for forestry, Hugo Catillo, told El Mercurio the fires had begun during a heat wave on Tuesday, Wednesday, and Thursday last week where temperatures exceeding 35°C—“high temperatures for us”—were recorded in many parts of the Chilean Central Valley.
“But we have to remember that the high temperatures, the wind, or the humidity are not the ones that produce the wildfires, but people,” said Catillo.
Chile has seen a rise in the number of wildfires larger than 200 hectares over the recent years, while the wildfire period, normally December to March, has expanded to September to May, a spokesperson for the national board of forestry told Climate Home News.
A 2018 study found the widespread replacement of native forest with flammable eucalyptus and pine plantations combined with a changing climate was behind an increase in fire danger.
COP 25 takes place in Chile November 11-22.