Yaounde's Briketteri neighbourhood, home to Muslim traders in textiles and beef, is seeing a surge of climate migrants - farmers and fishermen fleeing fast - drying Lake Chad to the north. Lake Chad, a large shallow freshwater lake that borders Chad, Niger, Nigeria and Cameroon, has shrunk in size by as much as 90 per cent over the last four decades, forcing a growing number of farmers, fishermen and herders who depend on it to seek new livelihoods elsewhere.