Folks from Antioch to Discovery Bay and beyond got a dramatic view of giant plumes of smoke rising from the Delta on Sunday afternoon. According to Bay Area Quality Management District, the smoke and floating ash were caused by a 15-acre prescribed burn on an uninhabited sector of Lower Sherman Island near Rio Vista. The fire caused plenty of rubbernecking traffic jams up and down the Delta. Press photographer Angelo Garcia Jr. snapped this shot from the Antioch waterfront.