VANCOUVER, British Columbia: Firefighters battling wildfires in western Canada received help from reinforcements and milder weather Saturday, after the nation's worst fire season on record destroyed structures, fouled the air with thick smoke and prompted evacuation orders for tens of thousands of residents.

Flames were being held at bay 15 kilometers (9 miles) from Yellowknife, the capital of the Northwest Territories, and weary firefighters had a reprieve around Kelowna in British Columbia. But the firefighters were nowhere close to declaring victory, especially with drier and windier weather forecast for the coming days.