On Wednesday evening, it was found that less than a third of the forest fire that started on July 14 managed to be extinguished.
The flames have burned just over 2,000 square kilometers of land, making the fire by far the largest in the state's history.
About 10,000 people are currently working to fight Dixie.
So far, two firefighters have been injured and one civilian.
More than 1,000 buildings have been destroyed and thousands more are still threatened.
The flames erupted, for example, through the historic mining town of Greenville last week, leaving the main street in ruins.
- A high pressure continues to build up above the fire and will be the leading factor in thunderstorms that are expected to roll in in the next few days, the fire protection organization Cal Fire explains in an update on the incident.
The thunderstorm can hit the area with lightning that risks igniting more flames in northern California's dry forests and scrub.
- We see a really scary fire behavior.
We have many experienced firefighters who have never witnessed anything like this, especially during such a long time.
We therefore work blindly under these extreme conditions, says Chris Carlton from Pluma's National Forest Department to CNN.