Flash floods in the Himalayas pose significant risks to both local and downstream communities. They can devastate critical infrastructure, such as hydropower projects and transport corridors, and lead to long-term riverbed siltation, increasing flood risks in downstream areas. The destruction of homes, farms, and bridges isolates remote communities, disrupting livelihoods. Additionally, transboundary flash floods originating in upstream Himalayan nations, such as Nepal, can severely impact Indian states like Bihar, Arunachal Pradesh, and Sikkim, with minimal warning time.