(This story has been updated to add new information.)
A wildfire near Campo, an unincorporated community near the U.S.-Mexico border in San Diego County, quickly grew to 750 acres Wednesday evening and crossed Interstate 8, threatening structures and prompting evacuations, according to Cal Fire.
The Thorn Fire was reported July 15 near 2500 Buckthorn Trail, close to Clover Trail. It expanded from an initial 8 to 10 acres to 50 acres and crossed Interstate 8 by 5 p.m., and was 0% contained by 9:45 p.m…