Johannesburg, South Africa (CNN) -- In a symbol befitting a nation in mourning, dark gray clouds swept over Johannesburg on Friday.
Under overcast skies that threatened to rain any minute, South Africans draped in flags and images of Nelson Mandela gathered on the streets to sing and dance.
Children spelled out "we love you Mandela" on the grass using rocks near his home in the Johannesburg suburb of Houghton. Nearby, stuffed animals and flowers sat in a heap.
Others wept as they lit candles.