A raging, fast-moving Colorado wildfire continued to grow Sunday, prompting evacuations as some 20,000 acres burned, authorities said. First measured at two acres early Saturday morning, High Park fire has grown exponentially in the time since -- including more than doubling in size over the course of Sunday. Firefighters’ primary goal is to get people out of harm’s way and try to save as many buildings as possible, said Larimer County Sheriff Justin Smith said. Still, he admitted much is still beyond authorities’ control, thanks to low humidity, high temperatures and dry brush fueling the flames.