Firefighters continue to gain ground in their fight against the 39,111-acre Line Fire, which reached 49% containment Tuesday morning.

Cal Fire said about four structures were damaged and one was destroyed based on the damage assessments so far.

A Norco man accused of deliberately igniting the 39,000-acre Line fire that forced thousands of residents of Highland and the San Bernardino Mountains to flee pleaded not guilty to nine felony arson counts on Tuesday, Sept. 17.

Line Fire initially started 6:33 p.m. Sep. 5 in San Bernardino County. It has burned 39,232 acres after being active for 16 days. A crew of 2,956 firefighters has been working on site and they managed to contain 57% of the fire as of Saturday noon. The fire is suspected to have been started deliberately.

Cal Fire officials have publicly asked people to stop flying drones over fires, which they say severely impact their ability to do their jobs.

Cal Fire officials have asked people to stop flying drones over active fires and ongoing battles, as it restricts their ability to fly crucial water-dropping aircraft. Nicole Comstock reports.