MAPUTO—The death toll from tropical storm Ana has risen to at least 12 in Mozambique and Malawi, authorities said, although officials and aid agencies are still assessing the full impact of the storm that swept through southern Africa on Monday. Mozambique’s National Institute for Management and Disaster Risk Reduction said on Tuesday that eight people had died, 54 had been injured and 895 evacuated in the prior 24 hours. More than 20,000 people in Mozambique have been affected by the storm, with more than 3,000 homes partially destroyed and over 600 totally destroyed along with several health centers and dozens of classrooms, the institute said, adding that drones and boats had been deployed in relief efforts. In neighboring Malawi, where the storm led to major power cuts as flooding damaged electricity installations, the district commissioner for Chikwawa confirmed three more deaths, after the disaster department on Tuesday reported a death …