Arson behind California fires: BBC Reports
Governor Arnold Schwarzenegger facing the heat
BBC reports the US police have offered a $70,000 reward and called in FBI investigators to capture an alleged arsonist they believe started one of the larger fires.
Orange County officials are convinced the Santiago Canyon blaze, which broke out on Sunday, was no accident.
Around 15 blazes remain untamed but fire chiefs said they had "turned the corner"
The firestorm has ravaged at least 704 sq miles (1,825 sq km) of land from Santa Barbara down to the Mexican border.
More than 1,600 homes have been incinerated and over $1bn (£488m) of material damage caused by the wall of fire. US President George Bush after an aerial survey of the fires praised the Governor, "There is no mountain he is not willing to charge, no problem he is not willing to solve."