During the early afternoon of Tuesday, May 6, 1975, a tornado watch was issued for much of eastern Nebraska. Initial tornado activity started in northeast Nebraska throughout the first half of the afternoon. At around 4:15 PM, a tornado warning was issued for the Omaha area and an F4 tornado touched down about 15 minutes later in Sarpy County, Nebraska. The storm then moved north-east, cutting into Douglas County crossing Interstate 80 and through west-central sections of the city of Omaha. The tornado chopped a path across of streets and residences, crossing the city's busiest intersection at 72nd & Dodge. Extensive damage occurred along 72nd Street, with numerous homes and apartments severely damaged, along with Creighton Prep School and the United Methodist Church. The Westgate subdivision was devastated, with many homes leveled, and a few that were swept away. The nearby Westgate Elementary School was destroyed. Bergan Mercy Hospital, Lewis and ClarkJunior High School, a motel, and several industrial buildings were severely damaged as well. The tornado later lifted in the Benson Park area at 4:58. In one remarkable instance, First United Methodist Church minister of music Mel Olson spotted the rolling clouds in the sky outside the windows of the room where he was rehearsing a children's choir. He led them to safety below the church building. The building, located at 70th and Cass Streets, was struck and heavily damaged by the twister. The room where the children had been practicing, with three walls of windows, was hit and the glass exploded. Three people were killed and 133 others were injured. One of the fatalities was a women who was thrown by the tornado from her home to a backyard four or five houses away. Debris was found miles away. Over 4,000 buildings were damaged and 287 were destroyed. In terms of damage, it was the costliest tornado in American history to that date, with damages costing at least $250 million to $300 million, and insurance costs estimated at up to $1.1 billion. It was the third-costliest tornado, behind the Oklahoma City-area F5 tornado on May 3, 1999, and the Wichita Falls, Texas, tornadoes on April 10, 1979, until the Joplin, Missouri EF5 tornado on May 22, 2011. It is now currently the seventh-costliest tornado on record.