1:00 p.m. Sunday Update: The road has been reopened. Original Post: Crews are responding to a large grass fire in Grady County. On Sunday, the Oklahoma Highway Patrol told KOCO 5 that they were requested by Grady County officials to help with a wildfire.OHP said are helping with traffic control due to low visibility. At this time, US-81 is closed in both directions at the intersection of County Road 1580 in Grady County.KOCO 5 will provide updates as they become available.