A researcher describes the destructive power of the fires in Los Angeles, particularly the formation of fire tornadoes or fire whirls that can reach very high wind speeds. (AP Video: Rodrique Ngowi.)

Fire tornadoes a risk during California wildfires - and scientists are studying small ones in a lab

A researcher describes the destructive power of the fires in Los Angeles, particularly the formation of fire tornadoes or fire whirls that can reach very high wind speeds. (AP Video: Rodrique Ngowi.)