(AP) – California power regulators are stepping up their oversight of Pacific Gas & Electric after finding that the utility has neglected the maintenance of an electrical grid that has ignited a series of deadly wildfires in Northern California and forced periodic blackouts affecting millions of people. The reprimand delivered Thursday to PG&E served as official notice that it hasn’t been doing enough to reduce the risks posed by a combination of crumbling equipment and overgrown trees near its power lines. It marks the first step in a process that could eventually lead to regulators revoking PG&E’s utility license. PG&E says it’s made improvements to its tree-trimming program and will continue as part of its wildfire prevention efforts this summer.