Complex topography, coupled with intensifying environmental extremes and underlying socioeconomic vulnerability interact with hydrological hazards across South and Southeast Asia. Observational records and modeling efforts indicate intensifying impacts of natural hazards such as floods, droughts, wildfires and heatwaves. Data scarcity in the region presents significant challenges but also opens opportunities for innovation in modeling, risk analyses, and predictions. Despite considerable advances in hydrologic and hydrometeorological studies, key gaps remain in data integration and interdisciplinary knowledge synthesis. A persistent challenge lies in synthesizing fragmented knowledge across disciplines and geographic scales. This session intends to provide a collective perspective on (i) current trends in hydrologic disaster risk research, (ii) innovative approaches to address data gaps, and (iii) emerging research opportunities in hydrology, environmental science and AIML applications in the region. We welcome abstracts from researchers both within and outside the region, particularly those offering interdisciplinary insights or novel methodological contributions.