You might notice Toronto's sunsets looking a little more dramatic than usual this week, and there's actually a scientific explanation behind why you'll see more vibrant colours in the sky.Wildfire smoke from blazes burning across northern Quebec is continuing to drift into parts of southern Ontario this week, which is affecting air quality and creating the potential for vivid orange and red skies during sunrise and sunset in Toronto.Wildfires have significantly expanded across Quebec over the past few weeks, with the total area burned growing from roughly 9,300 hectares at the end of June to more than 530,000 hectares as of this past Saturday.Smoke from the wildfires first moved into parts of Ontario on Saturday, and additional smoke pushed south on Sunday, moving towards eastern Ontario, the Ottawa region, and parts of southern Ontario.The smoke arrives as Ontario is preparing for its second major heat wave of the summer. This week, temperatures are exp...