This document discusses the concept of water security and challenges facing water management in Southern Africa. It defines water security as the reliable availability of water for health, livelihoods, and production, coupled with an acceptable level of water-related risks. The region faces increasing water stress due to climate change and population growth. Countries have differing levels of water availability per capita. Effective water management is complex and must balance needs of agriculture, industry, ecosystems, and people. Failure to develop water resources or manage variability poses security risks to nations in the region.