What we know about the wildfires burning in Canada and sending smoke to the U.S. and U.K.

High winds and a warm, dry spring have led to a significant wave of wildfires in Canada, with over 200 fires reported, half of which are out of control, burning close to 2.2 million hectares—seven times the ten-year average. Saskatchewan and Manitoba have declared emergencies, prompting thousands to evacuate, while smoke from the fires has spread across the Atlantic, affecting air quality in the U.K. Alberta is also impacted, with major disruptions to oil production and evacuations in high-risk areas, as the fire season accelerates ahead of schedule.

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