I live in Calgary, population 1.1 million, but it's a fairly sparsely populated city in terms of people per square kilometre. Definitely a lot more fatties here than there are in Vancouver, which is much more densely populated. The fattest patients I've seen on the unit where I work were around 600-700 lbs. They didn't die on the unit, but if they did they wouldn't have fit into the standard size body bag, which I estimate is roughly three feet wide.