As wildfires continued to burn in Los Angeles, three fires broke out in San Diego County, prompting evacuation orders and warnings.

"If fire ignition occurs, conditions are favorable for very rapid fire spread and extreme fire behavior," the NWS warns.

Thousands of firefighters are battling wildfires across 45 square miles of densely populated Los Angeles County. About 82,000 people remain under mandatory evacuation orders and another 90,000 are under evacuation warnings.

At least 28 people are believed to be dead and more than a dozen others remain unaccounted for as multiple wildfires rage across Southern California.

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

Another brush fire erupted Wednesday morning in San Diego County, prompting evacuation orders. The so-called Center Fire was reported at 8:55 a.m. Wednesday in the San Bernardo community near Bernardo Center Drive and Camino del Norte and had the potential to burn up to 100 acres,