Sand blows across a normally submerged area at Theewaterskloof dam near Cape Town, South Africa, January 20, 2018. The dam, which supplies most of Cape Town's potable water, is currently dangerously low as the city faces "Day Zero", the point at which taps will be shut down across the city. REUTERS/Mike Hutchings SEARCH "HUTCHINGS ZERO" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY.