SAN DIEGO — The San Diego County Board of Supervisors unanimously approved a recommendation from Fifth District Supervisor Bill Horn on May 14 to study the feasibility of more controlled or “prescribed” burns and clearing more fire breaks to reduce the threat of catastrophic wildfires.

Horn based his recommendation on results of a study by the University of California, Riverside (UCR). Maps from the study show five widespread areas of San Diego County that have the potential to explode into major wild fires.

“I’ve always been concerned about the threat of accumulated fuel in our...