More than 100 structures destroyed in Southern California wildfire

Inmate firefighters battle the Mountain Fire at Swanhill Farms in Moorpark, California (Noah Berger/AP)

A Southern California wildfire has destroyed 132 structures, mostly homes, in less than two days, fire officials said as raging winds were forecast to ease.

The fire started on Wednesday morning in Ventura County and has grown to about 32 square miles (83 square kilometres) at 5% containment. Its cause has not been determined.