A brush fire that ignited in San Bernardino County late Tuesday morning has grown to over 35 acres, officials say.
The blaze, called the Roundup Fire, was reported by the San Bernardino County Fire Department at 11:50 a.m., after it began near Rattlesnake Canyon east of Hesperia and south of Apple Valley.
A large plume of smoke was visible throughout the high desert, the agency said on Twitter.
By 1:15 p.m., the fire had grown to 5 acres before growing to 15 acres minutes later. By 1:35 p.m., fire officials said it had grown to 31 acres and then 35 acres by 2:45 p.m.
Smoke from the fire was visible throughout the area, officials said, though the rate of spread was slow and no structures were immediately threatened.
Just before 4 p.m., officials said crews had managed 20% containment on the blaze thanks to two hand crews, two water tenders, 11 fire engines and two helicopters with seven overhead personnel assigned.
Officials reported in a final update just before 6:30 p.m. that containment had grown to 80% with crews expected to strengthen fire lines over the next several hours.
The cause of the fire is under investigation. No injuries have been reported.