Canadian wildfires prompt international aid and highlight need for better planning.

Canada is facing an unusually fierce wildfire season, with over 400 fires burning, of which 200 are out of control. The fires have spread across the country, covering major US cities in toxic smoke and prompting evacuations. The situation is expected to worsen, with the risk of wildfires remaining "unusually high" throughout the summer due to dry conditions. Wildfires are becoming more common due to climate change, and the Canadian government has been criticized for its carbon tax. The fires have also led to smog warnings and poor air quality in Canada and the US.