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.

The Rosa Fire burning along Highway 74 grew to more than 1,600 acres with 15% containment Tuesday afternoon, according to an update from Cal Fire.

Rising temperatures pose new challenges for firefighters who have made incremental progress against a massive wildfire in central California that has injured four people as it has become the biggest blaze in the state so far this year.