PG&E has shut off power for an estimated 7,400 customers in San Francisco, including those in Golden Gate Park and Sunset District, possibly due to a record-breaking heat wave that could strain the grid. The utility was reportedly working to repair a damaged section of its electrical system. The outage was reported around 2:30 pm, with most customers' power restored within 40 minutes, but around 800 customers were still without power as of 3:10 pm, which was expected to be turned back on by 6:30pm. The SF Department of Energy Management warned residents that power outages are common in extreme heat conditions, which could have led to Friday's outage. An earlier unplanned PG&E outage occurred Sunday morning, affecting 3,600 addresses in the Richmond/Sea Cliff neighborhood, but was fully restored after three and a half hours.