Various weather modification and geoengineering options are under discussion for mitigating climate change and for addressing water security issues, e.g., the UAE Research Program for Rain Enhancement Science. These options are controversially discussed in the public. However, their linkages have not been dicussed in detail yet. At this meeting, we would like to discuss the various challenges and opportunities arising from this interdisciplinary collaboration. Contributions are welcome, which investigate the various geoengineering and weather modification options from the local to the regional scale.