A temperature inversion had some people near Fort McMurray, Alberta thinking the fires had died down Tuesday morning. Here's an explainer on what an inversion is, and how it can affect a wildfire.

Mother Nature is making sure we are getting our fog fix. The winds continue to be light, keeping this stubborn fog in the forecast. Plus an inversion is still in place; the weather balloon reported 6 degrees at the airport this morning and 10 degrees at 1800 metres. We continue to sound like a broken...