SAN LUIS — Multiple fire departments responded to a large structure fire Tuesday evening at 107 Main Street in San Luis. Firefighters were called to the fire shortly before 8 p.m. and were still on scene at press time, with no more information available at that time regarding cause or extent of the fire. Alamosa firefighters responded to assist Costilla County firefighters and brought additional trucks including a ladder truck. Challenges for firefighters included propane tanks at the scene of the fire.