GRAAFF-REINET, South Africa (Reuters) - South Africa’s Karoo region has always been parched - it means land of thirst in the language of its earliest inhabitants, the Khoisan hunter gatherers. FILE PHOTO: Hydrologist Gideon Groenewald feels cracks in the clay in the dried up municipal dam in drought-stricken Graaff-Reinet, South Africa, November 14, 2019. REUTERS/Mike