In 2005, heavy rains flooded neighborhoods around Dakar, Senegal, forcing tens of thousands of people out of their homes.
It was the worst downpour in decades and Babacar Niang, a rapper also known as Matador, witnessed the devastation.
"People's faces read worry first, then fear," reads one line from his song, "Catastrophe."
But he couldn't just sit there and write songs about it, he wanted to do more.
In 2006, he founded Africulturban, a cultural center where young people go to create music and art.
The center feeds into a large and lively hip-hop scene that is often socially conscious.
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Mallika Seshadri contributed to this report. contributed to this story
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