In Nairobi's informal settlement of Kawangware, Kenyan vegetable seller Beverly confronts a grim reality — her one-room corrugated iron home and everything she owned has been destroyed in the worst floods in years.

Since March, torrential rains linked to climate change have inundated parts of East Africa, destroying homes and livelihoods, and displacing hundreds of thousands of people.

Now, with hunger knocking, the mother-of-two contemplates a dangerous exchange — sex for food.