More than 800 Canadian wildfires burning as air quality alerts extend to US

More than 800 wildfires are burning across Canada, with air quality alerts now extending south into multiple US states.

The large cluster of fires affecting western areas of Ontario are responsible for sending thick plumes of smoke and poor air quality across Thunder Bay and Toronto, with lower concentrations of smoke high in the atmosphere drifting over the Great Lakes and above New York with hazy skies and redder sunrise and sunsets likely.

A change in the wind direction by Monday means that the smoke will tend to be steered across Quebec with an improvement in air quality further south in the US.