Since its discovery four days ago, it has burned 2,998 acres. By Sunday evening, a crew of 421 firefighters effectively contained 7% of the fire. It is believed that human activity is responsible for this wildfire, although the specific action that sparked it remains unknown.

A wildfire burning in Shasta County has torched nearly 3,000 acres since it began last week and the smoke was blanketing parts of the Sacramento Valley Sunday.

The fire department says at least two apartments were heavily damaged by the fire and another four units are likely to be displaced too.

Two residents were treated on scene for minor injuries. The Richfield Fire Department adds that 12 adults and eight children were displaced and Red Cross is working with them.