M’HAMID EL GHIZLANE, Morocco — For generations, they were known as “rain nomads,” herders who moved constantly along the western rim of the Sahara Desert in search of a patch of green where their goats and camels could graze.
Then the rain, never plentiful, became even more sporadic. Temperatures got hotter. A dam choked another source of precious water, the Draa River. Not even the camels could endure.
Families whose lives revolved around the seasons and the needs of their livestock,