Core Viewpoint - The G20 "Hackathon" competition focuses on collaborative efforts to address disaster risks associated with climate change, emphasizing the use of digital technology and cross-national cooperation [1] Group 1: Event Overview - The G20 Hackathon, hosted by South Africa's Department of Science and Innovation, commenced on September 2 and will last for four days [1] - The event is conducted online, featuring participants from various countries including China, Canada, Singapore, Italy, Spain, Kenya, Nigeria, and Saudi Arabia, who are experts in data science, urban studies, and disaster risk management [1] Group 2: Competition Theme and Objectives - The theme of the competition is "Reducing Disaster Risk through Open Innovation," aiming to enhance disaster resilience in climate-vulnerable and water-scarce regions [1] - Participants will utilize artificial intelligence, machine learning, and geospatial analysis to develop innovative digital solutions, particularly focusing on predicting informal urban expansion and its impact on flood risks [1] Group 3: Expected Outcomes - The event serves as a dynamic testing ground for evidence-based solutions that can inform urban policy-making and planning [1] - The final results will be showcased at the G20 Research and Innovation Ministerial Meeting on September 23, contributing to high-level discussions on climate adaptation and urban resilience [1]