Shannon Larratt is Zentastic

[Note: Initially this seemed to be coming off Toronto Island Airport]

This is a different airport than the one you fly into internationally (this is coming off the Toronto Islands it looks like). I don't know what the source of the smoke is, but to put it into context size-wise, the CN tower is over 1,800 feet high and they are about the same distance away. There are also a number of fuel holding silos for the tankers that dock there.

Update: It's the Toronto Yacht Club that's on fire, and propane cylinders they had stored there keep making it worse. There is some risk of it spreading I guess but it's pretty much under control (although all I have heard out the window for the last fifteen minutes is fire engines).