SENEGALESE President Macky Sall has activated an emergency aid plan after a seven-hour downpour caused widespread floods. Water Minister Serigne Mbaye Thiam told national television that more rain fell on a single day on Saturday than the country would usually see during three months of the rainy season. Senegalese President Macky Sall. Photo: © European Union 2013 - European Parliament "This is an exceptional rainfall. We registered 124 millimetres of rain. This is the cumulative rain we get during the whole rainy season from July to September," Thiam said. At least one person was reported missing due to the floods…