An explosive new wildfire erupted north of Los Angeles on Wednesday, forcing tens of thousands of people to evacuate their homes and setting nerves jangling in an area still reeling from two deadly blazes.

All lanes of the I-5 Freeway through the Grapevine will be closed for an unknown duration, according to the California Highway Patrol.

A rapidly spreading wildfire in Southern California, known as the Hughes Fire, exploded to nearly 10,200 acres as of Thursday morning, crossing parts of Interstate 5 and sending heavy smoke billowing across the area.

A fast-growing brush fire forced evacuation orders in the Los Angeles County community of Castaic on Wednesday, officials said. The blaze, which officials named the Hughes Fire, was first reported shortly after 10:30 a.m. along Lake Hughes Road, near Castaic Lake and the 5 Freeway, according to Cal Fire.