Firefighters Friday were trying to make progress after the Canyon fire exploded to nearly 5,000 acres, forcing residents in northern Los Angeles and Ventura counties to evacuate.

An evacuation order has been issued for all of Lake Piru Recreation Area and east to the Los Angeles County line, south to SR 126, west to Center Street.

A brush fire started on a sweltering Thursday afternoon east of Lake Piru in Ventura County and led to evacuations as this week’s warm temperatures in Southern California reached their peak. The Canyon Fire was estimated at about 50 acres early Thursday afternoon before quickly spreading to more than 4,