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

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

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

A crew of 66 firefighters succeeded in containing 50% of the fire as of Tuesday evening. Investigations into its cause are