(USA Today)-- BLACK FOREST, Colo. - Authorities ended mandatory evacuations Friday afternoon as light rains and cooling helped firefighters gain in their fierce battle against the state's worst wildfire on record, which was likely caused by humans.
El Paso County Sheriff Terry Maketa said he was "pretty confident" that lightning or other natural phenomena would be ruled out as the cause of the fire outside Colorado Springs. The blaze has killed two people, destroyed 400 homes and displaced tens of thousands of residents.
See also: 2 dead as wind-fed Colo. fire burns over 350 homes
"We didn't have lightning in the area," he said, adding that investigators would try to determine whether the fire was arson or an accident.
The change in weather aided the effort against the blaze, which had been fueled by dry timber, record heat and stiff winds since it began Tuesday.
"We're turning a corner and, although we had just a terrible tragedy, the success of the firefighting efforts was much better" overnight, El Paso County Sheriff Terry Maketa said. "I'm not even sure we had any fire losses (of homes) Thursday night, if any, maybe one or two."
The blaze is now the most destructive in Colorado history, surpassing last year's Waldo Canyon Fire, which burned 347 homes and killed two people.
Maketa said the fire was 30% contained Friday evening, with full containment forecast for June 20. About 800 firefighters were on the scene.
The fire was burning about 25 square miles Friday within a few miles of Colorado Springs, the state's second largest city. More than 38,000 people across 70 square miles have been forced to evacuate, Maketa said.
Authorities ordered residents of 1,000 homes in the nearby city of Colorado Springs to evacuate Thursday and told residents of another 2,000 homes to be prepared to leave. Although humidity levels remain very low across Colorado today, the National Weather Service reports that winds are forecast to stay below 20 mph in most areas -- good news for firefighters.
Black Forest resident Randy Welsch, 57, said his house is in a voluntary evacuation zone, which is not patrolled by police and thus could be susceptible to looting.
"We're staying with our friends over night and during the day we go back to our house," said Welsch, who has lived in the area for 20 years. "It's a big hassle to be out of the house, but it's not the end of the world."
The Black Forest home that Deanna Ronco and her family lived in for 18 years was consumed by the flames. The odyssey began Tuesday afternoon, when Ronco got a call from emergency responders saying the family needed to leave right away.
Ronco started packing up for her five children but didn't bother packing anything sentimental -- she thought they would be back. She remembers the odd sight of smoke blowing in front of the sun and the sky turning a red hue.
Two days later, Ronco learned from a friend who is a volunteer firefighter that her home was gone.
"It's kind of been a roller coaster since then, trying to get my kids taken care of so we can take care of logistics," said Ronco, 40. "The sad part is it's not even over, and we're not even the only ones that have been affected."
That night, she and her husband left their children with friends and got a hotel room for the night so they could grieve for their home. "It's a very surreal feeling," she said.
Southwest of Colorado Springs, authorities opened a major highway and lifted evacuations at the Royal Gorge Fire, which had been 40% contained by early afternoon Friday.
The fire, which started Tuesday near Canon City, had burned more than 3,100 acres and damaged the historic steel-and-wooden-plank Royal Gorge Bridge and destroyed 48 of the park's 52 structures, which include rides, shows and other tourist attractions. The bridge is the highest in the United States.
The park operator and local officials plan to rebuild, the Canon City Daily Recordreported.
The cause of the fire has not been determined.
In Rocky Mountain National Park, the lightning-sparked Big Meadow Fire had burned more than 350 acres of wilderness and was 30% contained Friday, four days after it started, officials said. The park remains open.
Blair Shiff reports for KUSA-TV in Denver. Contributing: Melanie Eversley, Lauren Kirkwood, Michael Auslen, William M. Welch and John Bacon., USA TODAY; Associated Press