The current status of the Ouagadougou water supply is precarious. Water in the reservoirs, available for use as of March 10, will be exhausted by June 10 if the average daily reduction of volume experienced in January is allowed to continue. While it is entirely possible that current supplies can sustain present withdrawal rates until refilled by the annual rains, higher evaporation rates or the later-than-normal start of the rainy season could leave the reservoirs at useless levels.