UPDATE: 9:20 a.m., July 13,2017

Crews working to extinguish the smoldering remnants of a wildfire that scorched some 400 acres in the Flinn Springs area had the burn area roughly 90 percent contained Thursday morning.

Engine emissions from a passing vehicle sparked the so-called Jennings Fire alongside Interstate 8 near Old Highway 80 shortly before 2 p.m. Tuesday, according to Cal Fire.

RELATED: San Diego Firefighters Help Battle State’s Largest Wildfire

An evacuation order was issued Tuesday for residents of threatened homes along nearby View Side Lane, but they were allowed to return home Tuesday night, according to Cal Fire.

The fire also prompted a temporary shut down of Interstate 8 between Tavern and Lake Jennings Park roads, which led to hours of gridlock in both directions.

Jennings Fire Map Your browser does not support inline frames or is currently configured not to display inline frames. Content can be viewed at actual source page: http://api.kpbs.org/fires/maps/gspread/5

One to three eastbound lanes near the fire were out of commission at various times Wednesday morning and afternoon as firefighters continued to douse hot spots and create lines of control around the charred areas. The interstate was fully reopened as of 4:30 p.m., the California Highway Patrol reported.

No structural damage or injuries were reported.

Jennings Fire In East County Started By Automobile Exhaust GUEST: Isaac Sanchez, captain, Cal Fire Transcript for audioclip 35758

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