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.

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.