"The fire is growing with a moderate rate of spread and structures are threatened," Cal Fire said as it issued evacuation orders.

Multiple brush fires erupted in San Diego’s North County early Tuesday morning, prompting a fast response from firefighters and mandatory evacuations.

The fires come as San Diego County mountains and valleys, along with other parts of Southern California, remain under a red flag warning.

Thousands of firefighters have been battling wildfires across 45 square miles of densely populated Los Angeles County. The two largest fires, the Palisades Fire in Pacific Palisades and the Eaton Fire near Pasadena, remain active.

A wind-driven wildfire charred dozens of acres in the sparsely developed northeastern reaches of San Diego County, damaging structures and forcing pre-dawn evacuations before crews could gain the upper hand on the flames Wednesday.

Forward progress was stopped on the Lilac fire around 10 a.m. It was one of three fires in North County early Tuesday.

A wind-driven wildfire charred dozens of acres in a sparsely developed area south of Pala Mesa on Wednesday, damaging structures and forcing pre-dawn evacuations before crews could gain the upper hand on the flames.

A vegetation fire broke out in Bonsall in North San Diego County, damaging multiple structures early Tuesday morning.

The Palisades and Eaton wildfires continue burning in the Los Angeles area that left parts of Southern California with devastating fire damage.

A second day of windy and dry conditions is in store for Southern California. Winds have picked up and are expected to continue through Tuesday morning, raising the risk of new wildfires sparking.