Firefighters arived to a heavy smoke condition this morning in Lynn Ma at 449 Essex St., across from the 911 dipatch center.Fire started in the basment and worked its way into the walls. First report came in as thick black smoke from the chimney. After an off duty firefighter looked out the 911 center they struck a box for thick black smoke from the basement. They then recieved a call for a fire in the building. Fire was under control in about an hour and a half.