Actors Tom Cruise and John Travolta have spoken of their anguish as California fires led to a quarter of a million people being evacuated.
Cruise spoke about the fires at the London premiere of Lions for Lambs
At least one person has died during wildfires across the Los Angeles region, home to many celebrities.
At the London premiere of movie Lions for Lambs, Cruise said: "It's unfortunate it really is. I wish everybody well back there."
Travolta said: "All I know is the people I know are safe and I'm glad."
He added: "I flew over that today and it's always a dramatic impression you get from this."
At least 655 homes have been destroyed in fires which followed a record summer heatwave.
Fires stretch south to the Mexican border, putting homes at risk in seven counties where 200,000 acres (81,000 hectares) have been scorched.
Thousands more homes are threatened as hotter temperatures and high winds are forecast.
The coastal area is home to many celebrities, including actors Mel Gibson, Barbra Streisand, Richard Gere, Pierce Brosnan, Dick Van Dyke and Ted Danson, singers Sting and Olivia Newton-John, director James Cameron and music mogul David Geffen.
Singer Britney Spears said: "I don't think it touched my house. I'm real scared."
About 1,500 National Guardsmen have been brought in to help firefighters.
After visiting charred homes in Malibu, Governor Arnold Schwarzenegger said it was a "tragic time" for the US state.