Creation of deadly US 'firenado' explained

Updated December 7 2018 - 11:11am, first published December 6 2018 - 2:54pm
The Carr Fire in northern California claimed eight lives and more than 1000 homes.
The Carr Fire in northern California claimed eight lives and more than 1000 homes.

A rare fire tornado that raged during the deadly fire in northern California was created by a combination of scorching weather, erratic winds and an ice-topped cloud that towered kilometres into the atmosphere, a study says.