Hours after a big rig crash and fire led to a hazmat incident, Highway 166 between the Central Coast and Cuyama Valley had one-way traffic control Wednesday morning.

At approximately 8:30 p.m. Tuesday, emergency crews responded to an iPhone alert about a crash on Highway 166 near Chimineas Ranch Road northeast of Santa Maria, the California Highway Patrol said. 

Officers found a semi-truck had tipped over and caught on fire about 44 miles east of Highway 101, with the wreckage filling the two lanes of the narrow roadway.

No one was injured in the crash and fire, the CHP said.

Highway 166 remained closed for most of the night after crews dealt with the incident including calling for an excavator to help break up materials. 

Complicating to situation, a saddlebag, or temporary container, holding fuel ruptured, spilling an unknown amount that required notifying California Department of Fish and Wildlife personnel.

The crash and fire destroyed a 100-foot section of guardrail which had melted into the roadway, according to CHP dispatch reports.

While the roadway remained fully closed for most of the night between Highway 101 and Perkins Road near New Cuyama, crews implemented one-way traffic control as of 5 a.m. Wednesday, according to the CHP.

Traffic was backing up on northbound Highway 101 for a time Wednesday morning, the CHP added.

Alternative routs included Highway 126 in Ventura County and Highway 41/46 in San Luis Obispo County.

Authorities did not provide an estimate for when the roadway would reopen.

The truck crash occurred more than two hours after emergency personnel responded to a two-vehicle crash on Highway 166 near Cable Corral Road, causing minor to moderate injuries.

One patient was transported to an area hospital by medical helicopter, the CHP said.

The preliminary investigation blamed the crash on a passing attempt 32 miles east of Highway 101, the CHP said.