The Madre Fire in California's San Luis Obispo County has rapidly grown to over 35,500 acres, prompting evacuations near Highway 166, which is closed between US 101 and Perkins Road. The blaze, the largest in California this year, threatens approximately 50 structures. Officials cite high rates of spread due to weather and fuel conditions, warning of extensive smoke impacts. The cause remains under investigation.

Prepared by Olivia Bennett and reviewed by editorial team.