A massive California wildfire has prompted evacuation orders and a highway closure. The Madre Fire ignited Wednesday afternoon in San Luis Obispo County, according to Cal Fire. It has since grown to 79,936 acres and is 30% contained as of Sunday, fire officials said.

California's Madre Fire sparked in the late evening of July 3 but has since grown to the largest in the state this year by the Fourth.

The blaze is burning in a rural area of San Luis Obispo County, in the central coast, but its smoke has spread to nearby counties.

A central California wildfire has exploded to more than more than 80,000 acres, prompting a slew of evacuation notices.