A brush fire tore through an estimated 10 to 12 acres of vegetation along Highway 79 near Santa Ysabel yesterday, forcing a hard road closure and putting at least one nearby structure in immediate danger. Fire crews and law enforcement rushed to the rural corridor as engines, brush rigs, and patrol units crowded the two-lane highway while firefighters tried to slow the flames chewing through brush and chaparral. Officials urged drivers and residents to steer clear so crews could safely get in, anchor the fire, and build containment lines.
Officials' updates and road closures
According to a post retweeted by the San Diego Sheriff's Office, CAL FIRE San Diego pegged the blaze at roughly 10 to 12 acres and reported one structure under immediate threat, along with a hard closure of Highway 79 between Morretis Junction and Mesa Grande Road. The message asked motorists and nearby residents to stay out of the area while firefighters worked the flanks and tried to keep the fire from spreading.
@CALFIRESANDIEGO is at scene of a vegetation fire on Highway 79 in the community of Santa Ysabel. The fire is 10-12 acres. There is one immediate structure threat and a hard road closure on Hwy 79 between Morretis Junction and Mesa Grande rd. Stay out of the area. #JuntionFire pic.twitter.com/xec8t5pW0i
— CAL FIRE/San Diego County Fire (@CALFIRESANDIEGO) June 30, 2026
County fire activity and context
The Highway 79 incident lands in the middle of a busy stretch for regional fire crews as drying conditions turn inland brush into ready fuel. NBC 7 San Diego reported that a June vegetation fire in Jamul grew to about 24 acres, and KPBS detailed a larger wildfire near Dulzura earlier this month that burned thousands of acres. Together, those recent fires highlight how quickly early-summer conditions can turn routine calls into major backcountry campaigns, keeping agencies on constant alert along routes like Highway 79.
Where to get updates and stay safe
Officials are urging people to avoid the affected stretch of Highway 79 and rely on official channels for any new developments. The most direct on-scene update came through the San Diego Sheriff's Office post relaying CAL FIRE's assessment. For guidance on defensible space, readiness, and evacuation planning, residents can check resources from CAL FIRE and local law enforcement updates. If you are in immediate danger, call 9-1-1.
