LOS ANGELES—Firefighters battled on Saturday to outflank a wildfire that has forced the closure of an interstate highway in Northern California as the blaze swept through explosively dry mountain timber in the Shasta-Trinity National Forest for a fourth day.
The Delta Fire has scorched more than 31,000 acres (12,545 hectares) in the Cascade range since erupting on Wednesday in a forest canyon along the Sacramento River, about 250 miles (402 km) north of San Francisco, fire officials said.
