<p>This study addresses the gender data gap in disaster contexts, a major barrier to achieving the Sustainable Development Goal of equitable climate action. Using a novel rapid assessment survey tool, we collected sex disaggregated data from 2,031 individuals across 37 coastal villages in Bangladesh, one week after Cyclone Remal in May 2024. The analysis extends beyond the conventional comparison of male- and female-headed households by capturing individual-level welfare losses for men and women. It uses a comprehensive, multi-domain welfare framework encompassing food security, sanitation, healthcare, paid and unpaid work, and gender-based violence. Findings reveal widespread declines in food security, sanitation, healthcare, and paid employment for both men and women. Women faced greater barriers to healthcare access, while men experienced more severe sanitation challenges. Our findings also reveal that women spent significantly more time collecting water and cooking fuel due to disrupted infrastructure and gendered domestic roles. Interruptions in paid employment primarily drove men’s income losses. Intersectional analysis indicates that less educated women suffer higher food insecurity than men with comparable education levels. In areas experiencing severe damage, reports of gender-based violence also rose. The study demonstrates that rapid, individual-level, sex-disaggregated data can be collected in the immediate aftermath of disasters, providing an empirically grounded basis for equitable response and recovery policies and inclusive climate resilience planning.</p>