Brush fire breaks out in Topanga; progress halted at 15 acres July 19, 2021 5:22 PM PT Print A brush fire broke out Monday afternoon in Topanga, spreading across 15 acres and threatening some structures before fire crews stopped its progress, authorities said. Flames were reported about 3 p.m. in the hills near Tuna Canyon Road and Las Flores Heights Road, just north of Tuna Canyon Park. The blaze grew from three acres to seven in about 45 minutes, posing a threat to some structures, the Los Angeles County Fire Department said on Twitter. The Fire Department dispatched 195 firefighters to the scene and deployed helicopters and fixed-wing aircraft to douse the flames with water and fire retardant.