Rocky Fire has scorched 62,000 acres, forced the evacuation of more than 13,000 people

A wildfire that has devoured drought-parched terrain in northern California with remarkable speed raged on for a sixth day on Monday as evacuations expanded and firefighters began to gain some ground against the flames.

The blaze, dubbed the Rocky Fire, has scorched some 62,000 acres and destroyed more than 50 structures since erupting last week in the canyons and foothills along the inland flanks of California's North Coast Ranges, quadrupling in size over the weekend.