The Los Angeles Fire Department issued an update just after 5 p.m. PT said the fire had been caused by someone clearing weeds and debris. Media reports, citing authorities, pinned it on a homeowner using a weed-trimmer, which created a spark.
Earlier, the LAFD said moist air as well as water dropped from helicopters had helped contain the fire, which now covers about 30 acres. Even so, they expect to be fighting the flames for at least another 36 hours.
While the fire has come within 200 feet of structures, no homes are currently at risk, the fire department said, and no evacuation order is in place.
Just before 1 p.m. Pacific time, a call from a home at 2969 N. Mandeville Canyon Rd. alerted authorities to the fire. The Brentwood neighborhood next to the fire area is dense with estates belonging to major Hollywood players.
Conditions for brush fires have been developing due to hot and dry weather across Southern California. The Memorial Day weekend has seen highs reach the 80s and 90s, and there is almost zero chance of rain in the 10-day forecast.
Social media has been lighting up with images and reports under the hashtag #MandevilleFire, especially with residents out for holiday weekend hikes and outdoor activity. Smoke has been visible (and breathable) for miles. The fire has also tied up traffic along the 405 freeway and Sunset Boulevard as emergency vehicles and observers clog the roads. Mandeville Canyon Road was closed at Sunset.