MILLSTON, Wis. (WEAU) - Black River Falls Fire crews responded to a semi-truck fire on I-94 around 3:30 p.m. on Tuesday. According to Black River Falls Fire and Rescue’s Facebook page, the fire was confined to the cab and the semi was transporting building materials. Upon arrival, crews found the semi-truck fully engulfed in flames, which prompted a temporary halt in interstate traffic. The fire did not extend into the building materials.