This document is intended to help water suppliers and WSP teams who have already committed to using the WSP approach and are developing and implementing WSPs to gain greater understanding of climate change and how it can be considered and addressed in the WSP process. This document will also be useful to other stakeholders, particularly health and environment agencies who are supporting WSP implementation. It discusses how to take into consideration the broader issues of climate change, regional climate vulnerability assessments, disaster risk reduction and integrated water resources management within the WSP process. The details of how this is done for any particular WSP depend upon local circumstances.