Most Forest Fires in Canada Are Simply Impossible to Put Out / Half of Canada’s wildfires are in remote areas with no road access. Impossible to fight, they are often left to burn.

The areas burned by forest fires have nearly quadrupled since the 1970s, Mr. Flannigan said.

“It’s largely, not solely, due to human-caused climate change,” he said. “Warmer weather means longer fire seasons. In Canada, our fire seasons used to be fairly short, but they’re getting much longer. The warmer we get, the more lightning we see.”