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.

Rising temperatures on Wednesday posed new 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.

A motorist was hospitalized with burn injuries after getting out of his vehicle and being overrun by flames, said Flemming Bertelson, a spokesperson for the U.S. Forest Service.