Wildfires across the western United States and Canada have put millions of people under air quality alerts, as thousands of firefighters battle the flames.
A severe storm in Cornwall, Ontario, caused extensive damage, including a house fire from a lightning strike and widespread power outages.
The B.C. Wildfire Service says the cold front in northern B.C. is expected to generate strong winds, thunderstorms and the potential for dry lightning in the region plagued by drought.
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