California wildfires cross into Nevada, prompting evacuations

The Tamarack Fire burns behind a greenhouse in the Markleeville community of Alpine County, California (Noah Berger/AP)

A Northern California wildfire prompted evacuations after crossing into Nevada as crews continue to battle a mammoth blaze in southern Oregon.

The Tamarack Fire south of Lake Tahoe had burned more than 68 square miles (176 square kilometres) of timber and head-high chaparral in national forest land on Wednesday.