“While it is now safe to return home, people in the area of the fire should remain vigilant. Fire officials do not anticipate a complete firefight for several days. “If conditions worsen. Keep following this Boulder Office of Emergency Management page for updates.” The cause of the fire remains under investigation. Hell erupted Saturday afternoon and burned out of control Saturday night – prompting evacuation orders for thousands of residents, officials said. “The evacuation areas include 19,000 people and 8,000 homes,” the Boulder Office of Emergency said on Twitter on Saturday night. Management. By Monday morning, the fire had charred about 189 acres and was reduced to about 35 percent, the emergency management office said. No injuries were reported and no damage was done, the agency said late Sunday. Officials said a combination of lower temperatures and stellar firefighting efforts helped prevent the fire from burning property and injuring residents. Mike Smith of the Boulder Incident Management Team said he was “very happy” with the fight against the flame. “We had more than 200 firefighters from more than 30 services,” Smith told reporters Sunday. “This, combined with all the fuel reduction treatments we have done in this area, is one of the reasons we have been so successful.”