According to Cal Fire the Madre Fire ignited in San Luis Obispo County due to unknown causes on July 2, in the afternoon.

As of Wednesday, July 16, the Madre Fire is 93% contained and had burned more than 80,000 acres in southeast San Luis Obispo ...

The fire sparked near Highway 166 in New Cuyama in the afternoon of July 2, rapidly expanding to engulf 35,000 acres by that ...