[Tunis Afrique Presse] Tunis/Tunisia -- The 2021 World Water Week will be held online on August 23-27, with the theme Building Resilience Faster. On the agenda more than 300 sessions on a broad range of topics, curated by Stockholm International Water Institute (SIWI) but convened by world-leading organizations that share their latest insights. Much of the programme evolves around five top challenges that require our immediate attention.