By David Willis
BBC News, Los Angeles
More than 1,000 firefighters have been brought in to tackle a large blaze which is threatening hundreds of homes on the outskirts of Los Angeles.
Some residents are preparing to evacuate and schools in the area have been closed.
The fire broke out on Sunday and spread swiftly casting a haze over LA.
It has already devoured about 10,000 acres (4,000 hectares) of land and destroyed a warehouse along with at least five homes in the Moorpark area.
Fanning the flames - which are more than 30 feet (9m) high in places - are ferocious winds, gusting at up to 60 mph (97 km/h).
Hundreds of residents, some with horses and livestock, have already fled and others are preparing to do so.
Local authorities are preparing helicopters to drop water and flame retardant on the blaze.
One of the area's main highways was shut down temporarily because of the smoke.