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Today in History: Super Outbreak of Tornadoes Claims 315 Lives

4/3/2026

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Summary

Story summary

On April 3, 1974, the Super Outbreak unleashed 148 tornadoes across 13 U.S. states and Ontario, marking one of the deadliest tornado events in history. The outbreak resulted in at least 315 fatalities and 5,484 injuries, causing approximately $600 million in damage. At its peak, up to 15 tornadoes struck simultaneously, devastating vast areas.

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Story summary

On April 3, 1974, the Super Outbreak unleashed 148 tornadoes across 13 U.S. states and Ontario, marking one of the deadliest tornado events in history. The outbreak resulted in at least 315 fatalities and 5,484 injuries, causing approximately $600 million in damage. At its peak, up to 15 tornadoes struck simultaneously, devastating vast areas.