The Estherville Fire Department remained busy on Wednesday evening responding to a trailer on fire after spending several hours on scene of a structure fire. Fire Chief Dick Beaver says in a release crews had been back at the station for a short time after spending more than three hours fighting a the structure fire when they were called to the 800 block of South 28th Street on reports of a semi-trailer ablaze. When firefighters arrived, they found the trailer fully engulfed and spent close to an hour knocking down the flames. The trailer is considered a total loss and cause of the blaze has not been determined.