Since it started on Friday afternoon, the Gifford Fire -- which is situated within the Los Padres National Forest in Solvang, California -- has burned 83,933 acres and has only reached 9% containment, prompting evacuation orders for those in the Santa Barbara and San Luis Obispo counties, officials said.

California is once again in flames — this time, it’s the Gifford Fire scorching more than 82,000 acres across San Luis Obispo and Santa Barbara counties. But how do these wildfires start, and why do they spread so quickly?