Global Rapid Post-Disaster Damage Estimation (GRADE) Report : Rasuwa Flash Flood, Nepal

This report presents a rapid estimate of direct economic damage to physical assets caused by the Rasuwa Flash Flood in Nepal on August 26, 2026. Using the Global Rapid Post-Disaster Damage Estimation (GRADE) methodology, the assessment combined flood hazard modelling, remote sensing, and asset exposure and vulnerability analysis. Data sources included local reports, satellite imagery, government and humanitarian agency assessments, and building inventories, focusing on Rasuwa, Nuwakot, and Dhading districts along the Bhote Kohi-Trishuli corridor. The analysis was completed using data available up to September 1, 2026, and only estimates replacement costs for physical assets, excluding losses, needs, or environmental and social impacts.

Key findings of the GRADE assessment:

1. Total direct economic damage to physical assets is estimated at US$1.661 billion.
2. Damage was relatively localized, with the vast majority of physical impacts concentrated on three districts: Rasuwa, Nuwakot, and Dhading.
3. In terms of relative damage, Rasuwa suffered damage to 23.33% of the district’s total exposed value (TEV)
4. The hydropower sector was especially badly hit. 
5. Damage to buildings was significant, with approximately 12,200 buildings identified within the flood impact areas
6. Transport was also heavily impacted
7. The event has reportedly directly and indirectly affected an estimated 157,050 women and girls in Rasuwa and Nuwakot districts
8. The vulnerabilities and risks to the tourism sector in the affected districts were elevated before the event.