Exhausted crews battle Canadian wildfires as experts issue climate warning

Global heating and human changes to the landscape have invited more destructive fires, making fire season worse

Weeks of unprecedented wildfires in Canada have burned millions of hectares, displaced more than 100,000 residents and plunged the country into a nationwide crisis as exhausted crews battle hundreds of blazes. But experts caution that a changing climate and human actions on the landscape will probably make fire seasons worse in the coming years.

Hundreds of firefighters from across the world have flown to Canada to aid a nation stretched thin with a spring fire season that has shattered records on both sides of the country, with warmer and drier months still to come.