Containment measures the percentage of a fire's perimeter that firefighters have under control. Parts of the fire's interior may still be burning.

NBC News reports that the California Department of Forestry and Fire Protection declared the Palisades and Eaton Fires as 100% contained on Friday. Both fires broke out on Jan. 7 and combined burned more than 37,000 acres across Los Angeles County.

After nearly a month, the Palisades and Eaton fires in Los Angeles County have reached 100% containment, according to the California Department of Forestry and Fire Protection. The two blazes started on Jan.

The Palisades and Eaton fires, two of the deadliest and most destructive wildfires in California history, reached 100 percent containment more than three weeks after they began.

Eaton Fire initially started 6:18 p.m. Jan. 7 in Los Angeles County. Since its discovery two weeks ago, it has burned 14,021 acres. A fire crew of 2,375 has been working on site and, as of Tuesday noon, they managed to contain 89% of the fire. However, investigations into the cause are ongoing.

Here's the latest on containment for the fires burning across Southern California as firefighters work to extinguish the fires.

Mom, are we going to have to run?' Here's how the first 24 hours of our unprecedented conflagration unfolded across L.A. County