Box 8.6). Urban communities, in particular those living in informal settlements, are exposed to heatwaves. In Peru, analysis of water risks posed by climate change in the Vilcanota-Urubamba basin, Southern Peru, revealed seasonal water scarcity and glacial lake outburst floods , pose a serious threat for highly exposed and vulnerable people. It showed that very high-risk potentials of 134 current and another 6 out of 20 future glacier lakes as potentially highly susceptible to outburst floods. A total of eight existing and one possible future lakes indicate future river discharge could be reduced by some 2-11%  until 2050 . Farmers, in particular smallholders, in some regions face losses to irrigated agriculture and hydropower capacity with effects on water scarcity and food security . However, other assessments also point towards positive effects of water reservoirs and hydropower in terms of water storage, flood management and irrigation 
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report