Fire danger continued in the Pacific Northwest and Western Canada over the weekend, posing challenging conditions for crews battling to keep destructive blazes from spreading across the region with at least four fire-related deaths reported.

Canadian wildfires trigger mass evacuations and send smoke across the U.S., putting millions at risk from poor air quality.

The inferno that sent toxic smoke billowing toward the United States won't be the last. Officials are now battling both the wildfires and misinformation.

More episodes of wildfire smoke are in the offing for parts of Canada and the midwestern and northeastern United States.

Follow Yahoo News Canada's live coverage as the country's wildfire crisis continues. Get the latest on fast-moving fires in British Columbia, the massive Thunder Bay-area wildfire in Ontario,

In British Columbia, wildfires are spreading rapidly, prompting 40 evacuation orders. Thousands have fled due to the intense Bald Range fire.

British Columbia has declared a "state of emergency" as the Bald Range wildfire reaches 9,500 hectares, forcing more than 20,000 people to evacuate. Scientists explain how this wildfire can control weather.

Faced with another summer when wildfires have scorched millions of hectares of land and blankets of smoke have disrupted daily life nationwide, Canada is