‘Out of control’ fires burn across Canada as poor air quality expected to persist

Hundreds of wildfires burn in country, with 238 out of control' as of Tuesday afternoon, blanketing cities in smoke

• Canada wildfires smoke: latest updates

Hundreds of wildfires are burning across Canada, many of them out of control, have blanketed cities in a thick haze of smoke, amid warnings from experts the situation will continue to worsen.

Toronto has long been known as the Big Smoke" for its history of heavy industry, but the nickname took on a different meaning on Wednesday when residents donned masks outside, following alerts from officials that the city's air quality would continue to deteriorate. Outdoor school events were delayed and city officials warned vulnerable groups to remain inside when possible. In the nation's capital of Ottawa, Environment Canada said the air quality was very high risk", alongside the nearby cities of Kingston, Cornwall and Belleville. In much of southern Ontario, the poor air quality is expected to persist into the weekend.