Generally, damage to homes caused by hail or wind is covered. And this would include damage caused by flying debris or falling branches, ect. There generally would also be coverage for contents in your home that were damage as a result of water entering through openings caused by the wind. Click here to read the full blog.
Info from the Insurance Bureau of Canada: http://www.ibc.ca/en/Home_Insurance/documents/brochures/Tornado%20brochure_EN.pdf
Contact your insurance broker for more information 🙂