An outbreak of deadly bacteria at a Bay Area homeless encampment has sparked urgent calls for action in Los Angeles, with officials warning the disease may already be circulating in the city. The bacterial disease leptospirosis was found in rats at encampments in the hippie college town of Berkeley, leading health officials there to issue an urgent warning to the homeless to clear out. Officials told them to relocate at least a third of a mile from the “red zone” encompassing several square blocks as soon as possible. The warning comes as authorities attempted remove the encampment last year but...