The fires spread to forested sections near to, but generally away from major structures, but 19 small structures were destroyed and there was also extensive damage to an old dormitory. The fire was so intense that vehicles left near the fire had their wheels melted, windshields shattered and paint scorched. Though most of the Old Faithful complex had been spared, the park service decided that for the first time, the entire park would be closed to non-emergency personnel on September 8. The night of the 9th and the morning of September 10, the North Fork fire jumped a fireline along its northeastern flank and approached Mammoth Hot Springs where a large concentration of historical structures as well as the Park Headquarters is located. Rain and snow arrived in time to slow the fires before they threatened the complex. By the time the North Fork fire finally died down, it was responsible for 60% of the burned area within the park; more than .