700 are stranded without food and water . U.N. : Preliminary information indicates at least $ 15 million needed for relief aid . Others scrambled to climb atop roofs to avoid drowning . In the past few days , floods in the southern African nation killed Tens of thousands people .
700 are stranded without food and water . U.N. : Preliminary information indicates at least $ 15 million needed for relief aid . In the past few days , floods in the southern African nation killed Tens of thousands people .