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.

Quebec minister described ‘unprecedented’ situation amid warnings that country must be prepared in future

• Wildfires latest news – live

Wildfire crews in Canada continue to battle hundreds of blazes across the country as air quality in major cities remains poor and other regions brace for intense heat. And as the country burns, experts warn Canada needs to do a better job of readying its communities in areas increasingly prone to destructive blazes.

More than half of the 414 fires across the country are out of control, said the emergency preparedness minister, Bill Blair – with the hottest and driest months still to come.

Huge Barrington Lake fire now considered province’s largest wildfire but wet weather expected from Friday into next week

Rain on Friday and a rainy forecast for the weekend have fire officials hopeful they can get the largest wildfire ever recorded in Canada’s Atlantic coast province of Nova Scotia under control.

That wildfire and three others in the province have prompted air quality warnings in US regions as far south as Virginia and Maryland.