Smoke choking Canadians but cooling wildfires by blocking out sun
Wildfire smoke blanketing western Canada has triggered health warnings in several cities, but was also helping to cool blazes by blocking out a hot sun across hard-hit portions of the country Sunday.. Environment Canada issued warnings about poor air quality posing "very high risks" to health in the cities of Edmonton and Calgary, where the sky had an orange hue and the smell of smoke lingered in the air.