Websee the damage and flooding caused by a tornado and heavy rainstorms in drumbo, ayr, mississauga and other areas of southern ontario. The web page has. Weblearn about the different types of severe weather in canada during the warm months, such as lightning, rain, floods, storm surges, wind, tornado, hail, heat and humidity, uv. Weba tornado watch remains in effect for parts of southern ontario amid a risk for thunderstorms on saturday and sunday. Storms could produce large hail, heavy.