Harwinton Volunteers responded to the report of a structure fire early Sunday morning in extremely cold temperatures.. The single story wood frame structure appeared to have had heavy fire in the interior that spread to the attic space. Companies had to cut several holes in the roof to vetilate the attic and get at the fire seated within. The huse sustained heavy interior damage making it uninhabitable. The red Cross was called to assist the occupatants who escaped un harmed in finding shelter.