The weather conditions that fueled record-shattering wildfires in eastern Canada earlier this summer – and sent plumes of hazardous air into the US – were made more likely and more intense by the climate crisis, according to a new report published Tuesday.
Scientists from the World Weather Attribution initiative – which calculates the role of climate change in extreme weather events – found human-caused climate change more than doubled the likelihood of hot, dry and windy conditions that drove the Quebec fires between May and July, and made this fire-prone weather at least 20% more intense. The severity of Quebec’s fire season up to the end of July was also made 50% more intense by climate change, according to the report.
To understand the role of climate change in the fires, the WWA scientists looked at “fire weather” – including high temperatures, strong winds and dry conditions, all of which help fires ignite, spread and intensify. The scientists used data from the Fire Weather Index – a measure of fire danger – to gauge the persistence of extreme fire conditions as well as the severity of the fire season overall. They then used climate models to understand the role climate change played.
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