Media playback is unsupported on your device Media caption Wildfires devastate southern California

Nearly 200,000 residents have been evacuated from their homes in California as firefighters battle several raging wildfires.

Governor Jerry Brown declared a state of emergency in San Diego on Thursday after a new blaze spread from 10 acres to 4,100 acres in just a few hours.

Three firefighters have been injured and about 500 buildings destroyed.

One death has been reported - a woman's body was found in a burned-out area in Ventura County.

But an official told the Ventura Country Star newspaper that the death, in the town of Ojai, may have been the result of a car crash not related to the fire.

On Friday, US President Donald Trump issued a state of emergency in California, which will free up funding to "help alleviate the hardship and suffering that the emergency may inflict on the local population".

About 5,700 firefighters have been battling the brushfires, officials have said, with firefighters drafted in from neighbouring states to help.

Image copyright AFP Image caption The Thomas fire in Ventura County remains the largest, burning 180 square miles so far

The Thomas fire in Ventura County to the north of Los Angeles remains the largest of the blazes and has spread as far as the Pacific coast.

It has consumed 180 square miles (466 sq km) since it broke out on Monday, and destroyed more than 430 buildings, fire officials said.

A BBC correspondent in Ojai says the blaze is burning in the hills all around and more than 100 fire engines have been seen driving through the town centre.

A Reuters news agency photographer in San Diego county, site of the Lilac fire, described seeing propane tanks under houses explode like bombs.

Some 450 elite racehorses in the area were let loose from their stables to escape to safety, the Associated Press news agency reports. Officials say at least 25 thoroughbreds died in the blaze.

By Thursday afternoon local time, California's fire service said the blaze had forced the evacuation of 189,000 residents.

Image copyright EPA Image caption Firefighters rescued both a work of art and the family Christmas tree from this Bel Air home

Image copyright AFP Image caption Most homes in Bel Air cost millions of dollars

California is entering its fifth day battling dangerous wildfires driven by extreme weather: low humidity, high winds and parched ground.

Authorities have issued a purple alert - the highest level warning - amid what it called "extremely critical fire weather".

The powerful desert-heated Santa Ana winds have been fanning the flames.

Both the The University of California, Los Angeles (UCLA) and the Getty Center museum announced that they would reopen on Friday.

Firefighters battling the Skirball fire had slept at the Getty overnight on Thursday.

Media playback is unsupported on your device Media caption Drivers filmed the flames from their cars near Bel Air

One in four schools in Los Angeles were also closed.

In the wealthy Los Angeles enclave of Bel Air, firefighters were seen removing artwork from luxury homes on Wednesday as the Skirball Fire raged.

The neighbourhood is home to celebrities and business leaders from Beyonce to Elon Musk.

Singer Lionel Richie cancelled a Las Vegas performance for Wednesday evening, saying he was "helping family evacuate to a safer place".

An estate and vineyard owned by Rupert Murdoch also suffered some damage.

The media mogul said in a statement: "We believe the winery and house are still intact."

The Los Angeles Times said Mr Murdoch paid nearly $30m (£22m) for the property four years ago.

Another blaze north of Los Angeles, the Creek fire, was 20% contained and covered some 15,323 acres.

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