The Los Angeles Fire Department continued to provide mutual aid Tuesday to firefighters contending with the Sandy Fire across the L.A.-Ventura county line.
The blaze broke out around 10:15 a.m. on Monday near the 600 block of Sandy Drive, according to the Ventura County Fire Department.
One home was destroyed, but no injuries have been reported as a result of the blaze, which has scorched more than 1,300 acres of scrub brush covered hills in Simi Valley, which lies just across the county line from Chatsworth and the West San Fernando Valley.
Parts of the fire zone were affected by the 2018 Woolsey Fire.
On Tuesday evening, an evacuation warning was issued for Chatsworth, with residents advised to prepare to evacuate should conditions related to the Sandy Fire worsen, the LAFD announced.
It was unclear if LAFD air resources like the water-dropping helicopter sent to help battle the flames on Monday would be deployed on Tuesday, a department spokeswoman said.
Crews remain pre-deployed to that area and others of concern, she said.
On Monday, the LAFD sent three strike teams, hand crews and heavy equipment to assist Ventura County Fire Department crews battling a brush fire that has already torched at least one home and spurred evacuations in Simi Valley since it broke out around 10:30 a.m.
Crews appeared to have the upper hand on the fire Tuesday morning, although no containment figure has been announced and air quality concerns amid increasing winds prompted the South Coast Air Quality Management District to issue a wildfire smoke advisor through Tuesday evening.
Due to wind directions, areas likely to experience poor air quality include Calabasas, Pacific Palisades and Malibu, among others, according to the air quality management district.