Though in Canada there is a big gap between the areas. In the USA one could drive from Cleveland to Omaha and gradually transition. In Canada, a drive from Hamilton to Winnipeg would cross 100s of miles of low-habitation areas.
And Buffalo would hardly be considered a midwestern city, and Hamilton and Toronto are as far east. This would leave places like Kitchener and Sarnia as the equivalents of the industrial parts of the US Midwest. So in Canada, the industrial area stops at around Ohio.
Yes, good point. The industrial heartland runs in both the Midwest and Northeast and Lake Ontario is entirely in the "Northeast." I think Ontario would be considered part of the Northeast if it were part of the US.
ETA: Agreed the east-west divide is sharper in Canada.