Further north, another huge wild fire destroyed the town of Paradise, leaving nine people dead and 35 missing.
In all, three major fires are burning across the state.
Among the towns under evacuation orders is Thousand Oaks, where a gunman killed 12 people in a rampage on Wednesday.
Authorities say the Camp Fire in the north and the Woolsey Fire and Hill Fire in the south are being fanned by strong winds.
More than 250,000 people have been evacuated across the areas.
"The magnitude of the destruction of the fire is unbelievable and heartbreaking," said Mark Ghilarducci, of the California governor's office.
Where is the Woolsey Fire?
The blaze started on Thursday near Thousand Oaks, about 40 miles (64km) north-west of central Los Angeles. Another blaze, the Hill Fire, started at about the same time, also near Thousand Oaks.
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