Agence France-Presse: Southern African countries have been hit by the worst floods in years, killing more than 100 people and displacing thousands, as a tropical storm threatened to bring more pain on Saturday. As Mozambique braced for the arrival of a strengthening tropical storm Izilda, record river levels across the region threatened to exacerbate floods which have already affected hundreds of thousands of people. Namibia’s government declared a state of emergency last week in areas where floods …