California wildfires

Pacific Gas & Electric (PG&E) said the shut-offs on Tuesday are a precaution as high winds are forecast.

It already faces an investigation by regulators after cutting power to almost a million properties in a bid to reduce the fires.

Wildfires fanned by the strong winds are raging in two parts of the state.

Thousands of residents near the wealthy Brentwood neighbourhood of Los Angeles have been told to evacuate because of a wildfire that began early on Monday.

Hundreds of people remain missing as at least 22 fires rampaged across the state's famous wine country.

More than 8,000 firefighters are now battling the flames.

The wildfires have destroyed more than 3,500 buildings and homes over 170,000 acres (68,800 hectares) and displaced about 25,000 people.

Fifteen people are now confirmed killed in Sonoma County, with another eight in Mendocino County, four in Yuba County and two in Napa County, officials said.

About 20,000 people have fled from Napa, Sonoma and Yuba counties after three fires broke out across the area renowned for its vineyards.

At least one person has died as the fires spread rapidly, according to local media.

The governor of California declared an emergency as fire-fighters battled to control the wild blazes.

"These fires have destroyed structures and continue to threaten thousands of homes, necessitating the evacuation of thousands of residents," the declaration said.