Due to ongoing wildfire threats, Cal Fire suspended open burning on undeveloped state-owned lands in the San Diego area until further notice, the state agency has announced.

The ban, which went into effect Monday morning, rescinds all previously granted burning permits.

Cal Fire.

During the prohibition period, campfires will be restricted to licensed public campgrounds and private property maintained in a manner that prevents open flames from spreading to wilderness vegetation, according to Cal Fire.

The state action also activated a county ban on firing guns in open areas, except on appropriately maintained private property, at permitted shooting ranges, in self-defense or in the course of legal hunting.

The region experienced an unusually early opening to the fire season in May, when several wildfires raged throughout the county, with especially destructive blazes taking place in Carlsbad and San Marcos.

County officials have placed the cost of battling the May fires at more than $55 million. They also are studying how  to better prepare the region for future fires.

– City News Service contributed to this report.