Rising temperatures on Thursday posed more challenges for firefighters who have made incremental progress against a massive wildfire in central California that injured four people as it became the biggest blaze in the state so far this year.

The new orders were for an area near the west edge of Gifford, burning since last week in San Luis Obispo and Santa Barbara counties.

The fire has scorched at least 131 square miles of Santa Barbara and San Luis Obispo counties, with just 9% containment.