By Tim Stack
Updated August 02, 2009 at 09:34 PM EDT

One person is dead and 75 people injured after a thunderstorm caused a stage to collapse Saturday evening at the Big Valley Jamboree in Alberta, Canada, reports the Associated Press. Actor Kevin Costner and his band, Modern West, were scheduled to perform at the country music event but managed to escape without serious injury. The festival was scheduled to wrap up on Sunday but today’s festivities were cancelled.