Shot 06/30/2011.## (CNN) — The Las Conchas fire in New Mexico swelled to 92,735 acres burned Thursday, and strong winds threatened to be firefighters' greatest challenge moving in to the fifth day battling the flames.   "We have seen fire behavior we have never seen before," Fire Chief Doug Tucker told reporters Thursday. Tucker said no fire was coming from the south and that Thursday the fire would keep moving north towards Santa Clara. Officials also dispelled rumors that residents, who were worried about their homes, could return to Los Alamos. "Folks right now are hurting us," said Police Chief Wayne Torpy Thursday. "Los Alamos County called the evacuation and Los Alamos County will be the one that repeals the evacuation ... You’re going to erase the success of our evacuations." Torpy also said that residents' homes had not been impacted by the fire. However, the nearby flames will keep the Los Alamos National Laboratory closed through at least Friday, a statement on the lab's website said.##