Local reports said more than 100 people were inside a school building in Lake City, Iowa, on Sunday, May 10, when a tornado struck the building. An awards ceremony was taking place at South Central Calhoun High School, WHO-TV said, but those attending were able to take refuge in a basement as the storm ripped the roof off the school.
"Most of the roof of the building was torn off," said Austin Jacobs, who took these photos. "There was debris everywhere."
The school was closed on Monday, May 11.