The Gifford fire has rapidly spread after firefighters contained the Madre fire. Together, the two blazes have already burned over 100,000 acres.

A nearly 40,000-acre wildfire forced people from their homes in two Southern California counties over the weekend as firefighters worked to contain the blaze in challenging terrain.

A wildfire sparked Sunday afternoon in Clearlake has spread to about 100 acres within an hour, triggering two evacuation orders, according to fire officials.