Municipal workers react while operating a pump draining a flooded highway overpass in Sudan's capital Khartoum following heavy rain Wednesday.Flash floods have killed nine people in Sudan, a civil defence official said Wednesday, after heavy seasonal rains triggered flooding and flattened homes in the Nile Valley.The official said the deaths occurred when a torrential downpour struck the northern city of al-Dammer, the capital of River Nile State, on Tuesday, with the floodwaters surrounding five neighbourhoods and impeding access.