SAN DIEGO—Nearly 4,500 residents in San Diego County are still without power on Nov. 26, following a planned power outage started on Thanksgiving Day to prevent wildfires. During high winds, public safety power shutoffs are a way to reduce the risk of fires sparking from defective or damaged equipment. While the mountain and valley areas remain at risk for a public safety power shutoff, about 4,452 county residents woke up Friday morning to no power, according to San Diego Gas & Electric (SDG&E). Around 7:30 a.m., outages were planned for Alpine, Boulevard, Campo Reservation, Descanso, Fallbrook, Jamul, Potrero, and Warner Springs. Unplanned outages were also reported in the county. More than 40 communities, with almost 49,000 residents, could be affected by the outages, according to the utility company. Restoration is expected between Friday at 5 p.m. and Saturday at 5 p.m. In response to a red-flag warning issued earlier this week, SDG&E shut off electricity for high-risk …