Lower temperatures and higher humidity Saturday were helping crews assigned to a wildfire that has scorched 12 square miles in northern Colorado, one of several burning across the West. The fire, which started Monday about 20 miles northwest of Fort Collins, had prompted officials to evacuate about 80 homes, but all residents were allowed to return by Friday night. No buildings have been damaged, and the blaze was about 45 percent contained Saturday afternoon. Reghan Cloudman with the U.S. Forest Service said the area received about 0.15 inches of rain Saturday morning, which "is better than nothing." Scattered rain storms moved through the area in the afternoon, and temperatures were expected to remain in the 50s throughout the day — more than a 20-degree drop from highs during the previous three days. "The rain is definitely helping firefighters out there," Cloudman said. "It's good news, but we don't want people to let their guard down....