The fast-moving Jasper, Alta., wildfire was fuelled by a web of extreme conditions that converged into what experts described as a monstrous fire, serving as a disastrous example of what香蕉视频直播檚 become increasingly common across Canada香蕉视频直播檚 boreal forest.
What has happened in Jasper National Park is a 香蕉视频直播渕icrocosm of what we香蕉视频直播檙e seeing across Western Canada,香蕉视频直播� said wildfire risk expert and former Parks Canada wildland firefighter Mathieu Bourbonnais.
More than 20,000 people in and around the Rocky Mountain townsite were ordered to evacuate last Monday. By Wednesday night, fires had reached Jasper, with flames and smoke so intense it forced first responders to briefly retreat. About 30 per cent of the townsite has been destroyed.
Questions and accusations have followed, including from critics who argue Parks Canada and other government agencies did not do enough to protect Jasper.
The reality, says wildfire expert Chris Stockdale, is that the fire eludes simple explanations.
香蕉视频直播淚 think the compelling story is that it香蕉视频直播檚 complex,香蕉视频直播� said Stockdale, a wildfire risk management expert at Canada香蕉视频直播檚 Northern Forestry Centre in Edmonton.
Here is how wildfire experts described the blaze, how some well-publicized critiques oversimplify the problem, and how Canada香蕉视频直播檚 forest-managing and firefighting agencies may better prepare.
What were some of the major drivers of the Jasper wildfire?
Wildfire expert Mike Flannigan says the major drivers of the fire were a confluence of several extreme conditions. Drought in Western Canada combined with a roughly three-week stretch of hot temperatures to dry out the vegetation in the forest.
Lightning strikes on Monday night are thought to have lit the sparks that combined with strong winds to fan the flames across a dried-out landscape primed for a major fire, said Flannigan, a professor of wildland fire at Thompson Rivers University.
The wildfires, which Flannigan said 香蕉视频直播渓ove to run up and down river valleys,香蕉视频直播� started to the northeast and south of the Jasper townsite, itself located in a high-risk area at the confluence of three river valleys. Within 48 hours, fire was destroying homes and other buildings.
香蕉视频直播淚t香蕉视频直播檚 like a nightmare coming towards you,香蕉视频直播� said Flannigan.
Officials say flames licked the sky as high as 100 metres above the forest香蕉视频直播檚 canopy, catapulting scorched pine cones and other embers well ahead of the fire, accelerating its pace toward the townsite.
Overhead, a hellish storm formed, entirely of the fire香蕉视频直播檚 making. The fire-induced thunderstorm, called a pyrocumulonimbus storm, can generate lightning strikes and downdrafts, further igniting and fuelling the fires.
香蕉视频直播淚t香蕉视频直播檚 basically a moving monster,香蕉视频直播� Stockdale said.
The extreme conditions underlying the wildfire are 香蕉视频直播渃onsistent with what we expect with climate change,香蕉视频直播� Flannigan said.
Lightning strikes are expected to become more frequent as the planet warms. A warmer atmosphere, meanwhile, can absorb more moisture, helping to further dry out the vegetation that fuels the fire.
香蕉视频直播淎 warmer world means more fire,香蕉视频直播� he said.
What about the mountain pine beetle infestations?
Parks Canada has faced questions about whether it properly managed the swaths of dead forest that had been infested in recent years by mountain pine beetle, a wood-boring insect.
The pine beetle infestation, which peaked in 2019 before a major cold snap helped wipe out most of the population, has left behind dead pines across millions of hectares in Western Canada, including Jasper.
Those dead pine trees helped fuel the Jasper fire, but Stockdale, Bourbonnais and Flannigan all agreed it was likely not a major driver in comparison to the extreme fire conditions, such as drought and prolonged high temperatures.
香蕉视频直播淭he pine beetle isn香蕉视频直播檛 what made that fire so uncontrollable. It made it even more uncontrollable, but it香蕉视频直播檚 not like pine needle put it over the threshold where it suddenly became an unmanageable fire,香蕉视频直播� said Stockdale.
Pine beetle has infested roughly 21 million hectares of Canada香蕉视频直播檚 forests, Stockdale said. Removing all the beetle-infested wood from a fire-safe radius around each nearby Canadian town would be a monumental task.
香蕉视频直播淚t oversimplifies the problem,香蕉视频直播� he said.
香蕉视频直播淲hen you look at an individual community, it香蕉视频直播檚 easy to say, 香蕉视频直播榠f they香蕉视频直播檇 only done this, if they香蕉视频直播檇 only done that, if someone had done this, this wouldn香蕉视频直播檛 happened.香蕉视频直播� Sure, but it香蕉视频直播檚 not the only community, there香蕉视频直播檚 hundreds of them. And there香蕉视频直播檚 finite resources.香蕉视频直播�
Some commentators have also elevated the infestation to explain the fire香蕉视频直播檚 intensity, while simultaneously downplaying the role of climate change.
That argument overlooks that the infestation itself has been propelled by a warming planet, Bourbonnais said. Fewer cold snaps help the pine beetles grow their populations, while warmer conditions have also helped them expand into new areas, with Jasper residing on the edge of their historic and newly expanded range.
香蕉视频直播淚ts life cycle is really closely tied to climate,香蕉视频直播� said Bourbonnais, assistant professor at the University of British Columbia香蕉视频直播檚 Okanagan campus and co-director of the university香蕉视频直播檚 Centre for Wildfire Coexistence.
Are Canada香蕉视频直播檚 wildfire-fighting agencies doing enough prescribed burns?
Wildfires are a natural part of the boreal ecosystem, helping regenerate the forest in decades-long cycles. Logs and leaves are turned into mineral-rich ash that gets recycled into the soil on the forest floor, which is better exposed to sunlight that can stimulate new growth from seeds and roots.
Indigenous peoples, who were forcibly driven out of what香蕉视频直播檚 now known as Jasper in the early 20th century, had a long history of prescribed burns, which also helps reduce the risk of an out-of-control blaze.
But for many decades, provincial and federal agencies have suppressed fires across Canada香蕉视频直播檚 forests. In Jasper, landscapes once featuring grasslands and meadows with healthy elk and bison populations have been overtaken by stands of dense pine trees more susceptible to fire.
香蕉视频直播淪o, you have these even-aged homogeneous landscapes out there of single species. Then you get a fire into that under the right conditions and there香蕉视频直播檚 really nothing to stop it naturally,香蕉视频直播� said Bourbonnais.
Parks Canada eventually reintroduced prescribed burns starting in the 1980s, expanding it to Jasper in 1996, but the scale and frequency of those burns have not made up for years of suppression, a 2022 federal report said.
Despite the shortcomings, Parks Canada has become one of the most active agencies in Canada for prescribed burns, said Bourbonnais.
Yet, taken as a whole, agencies across the country burn less than one per cent of land in prescribed fires compared to their counterparts in the United States, despite overseeing more forest, he said.
香蕉视频直播淲e have to start turning that tide I think really, really soon,香蕉视频直播� said Bourbonnais, who香蕉视频直播檚 an ex-member of Alberta香蕉视频直播檚 disbanded Wildfire Rappel Program.
Is it time for a centralized emergency-management agency?
Wildfire experts say more resources need to be spent on fire mitigation and prevention measures across Canada, including for prescribed burns.
Budgets for wildfire fighting have paled in comparison to the resources spent on preventing mega-fires that have consumed the country香蕉视频直播檚 forests in recent years, Bourbonnais said.
Governments should also craft better legislation around how forests are harvested by the logging industry, setting out how those areas get replanted to promote more fire-resilient landscapes, he said.
Flannigan, meanwhile, has advocated for the federal government to establish a national agency comparable to the Federal Emergency Management Agency in the United States. He envisions the agency would be the point of command during disasters, including hurricanes and floods, and staffed with well-trained, quick deploy wildland firefighters.
香蕉视频直播淲hether it香蕉视频直播檚 reactionary or proactive, this is something we should consider. Not having a FEMA-type agency, it just seems weird that we don香蕉视频直播檛,香蕉视频直播� he said.
Asked recently about the possibility of establishing such an agency, Canada香蕉视频直播檚 Emergency Preparedness Minister Harjit Sajjan said it was being explored. But he praised the preparedness in Jasper and said all requests for more wildfire support had been approved.
More broadly, Bourbonnais said the fires should also serve as a chance to rethink a relationship with the landscape that has helped foster a fire-primed forest and fire-prone communities.
香蕉视频直播淔ocusing in on one thing, like, 香蕉视频直播榳hat does this community have to do?香蕉视频直播� Or, 香蕉视频直播榳hat did they do wrong?香蕉视频直播� That香蕉视频直播檚 not the point. This is going to continue happening unless we change something,香蕉视频直播� he said.
香蕉视频直播淲e do have a lot of the tools to start changing the outcome. We香蕉视频直播檙e just not applying them at the scale we need.香蕉视频直播�
