Teams combating deadly wildfires in Los Angeles have received offers of assistance from around the world, but claims that a video shows South African firefighters singing in an airport as they make their way to California are false.

Since multiple fires ignited across various communities in Los Angeles County last week, tens of thousands were forced to evacuate, more than 12,000 homes were destroyed or damaged and at least 24 people have been killed.

More powerful winds were expected to trigger new wildfires that could set back the recent progress made in containing blazes in the Los Angeles area that have destroyed thousands of homes and killed a

Portions of Southern California are under an "extreme" risk for fire danger amid strong winds until Wednesday.