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.

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

Those looking to assist residents affected by the Los Angeles County firestorm have a number of options to donate money, materials or their time.