 What we also believe to be the case is not confirmed. About 500 homes are in that mix. Again, making this one of the most devastating fires in New Mexico's history. Authorities in New Mexico are hoping heavy rain will help firefighting efforts. Assault and South Fork fires in south central New Mexico have burned over 42 square miles, damaged over 1,400 structures, and forced residents from the Piney Mountain town of Ruidoso.