Today marks the 40th anniversary of the 1974 Super Outbreak of tornadoes, a series of devastating convective storms that hit 13 U.S. states over a period of 24 hours.

RMS estimates that a recurrence of this event today could result in insured losses of between $7 to $8 billion.

Click through for a look at the destruction wrought on this dark day in '74, and some facts about the severe loss of lives and property.

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Shawn Moynihan

Shawn Moynihan is Editor-in-Chief of National Underwriter Property & Casualty. A St. John’s University alum, Moynihan has earned 11 Jesse H. Neal Awards, the Pulitzers of the business press; seven Azbee Awards, from the American Society of Business Press Editors; two Folio Awards; and a SABEW award, from the Society of American Business Editors & Writers. Prior to joining ALM, he served as Managing Editor/Online Editor of journalism institution Editor & Publisher, the trade bible of the newspaper industry. Moynihan also has held editorial positions with AOL, Metro New York, and Newhouse Newspapers. He can be reached at [email protected].