Recent Canadian wildfires are record-breaking - and will threaten US air quality for days

After historic seasons in last two years, blazes continue trend of warm, dry conditions intensified by climate crisis Enormous early-season wildfires have erupted across the prairie provinces of Canada this week, taxing local emergency response and threatening a long stretch of dangerous air quality across eastern North America. The country's largest fires - the Bird River fire and the Border fire - remain completely uncontained in northern Manitoba. In Manitoba alone, wildfires have burned abou...