Dubbed the Sandy Fire, the blaze broke out late Monday morning in Simi Valley, a city of around 125,000 residents about 60km northwest of downtown Los Angeles.

Driven by gusts of wind up to 56km/ph, the fire reached an area of 1,364 acres (552 hectares) by Monday evening, according to the CalFire firefighting agency.

The fire tore through one home, but no casualties have been reported.

Evacuations were ordered for parts of Simi Valley and neighbouring city Thousand Oaks, while several neighbourhoods in northern Los Angeles were put under evacuation warnings.

“Under an Evacuation Warning, residents are not required to leave immediately but are encouraged to be alert and be prepared to evacuate if conditions worsen and an Evacuation Order is issued,” LA Mayor Karen Bass told a press conference.

“At this time, we do not expect the wildfire to reach the City of Los Angeles,” she added.

Although winds weakened as evening fell on Monday, CalFire’s weather forecast said: “Warm temperatures, low afternoon humidity, and terrain-driven winds continue to challenge containment efforts.”