As tornado season starts heating south of the border, we take a look back at the most devastating outbreak of twisters in the country's history.
The 'Super Outbreak' was the largest 24-hour tornado outbreak in history. Between April 3rd and April 4th, 1974, there were 148 confirmed tornadoes in 13 states. Hundreds of communities were hit. Among the very worst was Xenia, Ohio, where more than 30 people were killed and over 1,000 were injured. In Canada, an F3 tornado struck Windsor, killing nine people. In total, there were more than 330 deaths and more than 5,000 injuries.