RASUWA-BHOTEKOSHI FLOOD

Situation Summary — Rural Reconstruction Nepal (RRN)

For internal and partner circulation

  1   WHAT HAPPENED  

Today’s report includes, for the first time in this series, a full account of how the disaster began. On 26 August 2026 (10 Bhadra 2083), a hanging glacier and rock mass of roughly 2.0 km² detached from the northern flank of Langtang Lirung at approximately 5,200m elevation and struck the Lhende Glacier at about 3,800m, generating a magnitude-5.2 seismic signal at 08:37 and a flood that travelled at an estimated 188 km/h, covering roughly 20km in 7–8 minutes. It crossed the Nepal–China border at Rasuwagadhi by 08:45, reached Syabrubesi by 08:50 and Betrawati by around 09:20, destroying hydrological monitoring stations along the way. A detailed early-warning timeline shows an escalating response through the day, including 679,295 SMS warnings sent via Nepal Telecom and Ncell, and confirms the flood peaked at Devghat around 16:00 with a discharge of 5,850 m³/s and a total estimated flow volume of 57.40 million m³, of which roughly 19.96 million m³ was additional floodwater.

On the ground today, the death toll has jumped by 40 (1,411 → 1,451), the long-anticipated catch-up from Upper Trishuli-1’s recovery total reaching the national figures (see Casualties and Missing). NDRRMA has also published a full coordination timeline for the first time, showing the arc of government response meetings since the disaster began, including a Prime Minister-chaired high-level review on Bhadra 25 (10 September 2026) (see Section 10).

  2   RAPID DAMAGE AND NEEDS ASSESSMENT (RDNA)  

(refined and expanded breakdown, first time physical damage and economic loss are split)

• Total physical damage: NPR 27,448.32 crore (USD 1,812.01 million).
• Total economic loss: NPR 13,380.58 crore (USD 883.32 million).
• Total disaster effects: NPR 40,828.91 crore (USD 2,695.33 million), the sum of the above and unchanged from the figure first published on 11 September (Bhadra 26).
• Total reconstruction and recovery needs: NPR 72,331.52 crore (USD 4,774.99 million), also unchanged.
• New context: total disaster effects and recovery needs are equivalent to 6.69% and 11.84% respectively of Nepal’s preliminary estimated nominal GDP for FY2024/25, the first time this has been expressed as a share of GDP.
• Infrastructure (most affected sector): NPR 19,004.39 crore in effects, NPR 47,357.19 crore in recovery needs. New detail: 13 hydropower projects (759.025 MW combined capacity) and 5 solar plants (24.36 MW) affected, alongside one substation and transmission/distribution systems. Of 37 affected motorable bridges, 33 were washed away; 68 suspension bridges damaged.
• Social sector: NPR 6,787.10 crore in effects, NPR 10,354.99 crore in recovery needs. Private housing damage specified for the first time at NPR 6,388.48 crore (7,570 houses). Public buildings: 48 damaged (35 fully, 13 partially). Education and health: 18 schools affected (11 fully, 7 partially — note this splits differently from the 13 fully/5 partially reported on 18 September for the same 18-school total); 7 health facilities affected (4 destroyed, 3 partial).
• Productive sector: NPR 15,037.42 crore in effects, NPR 5,077.49 crore in recovery needs, with NPR 14,619.73 crore of that concentrated in commercial/economic activity and livelihood losses, roughly 97% of the sector total.
• Cross-cutting and DRR: NPR 9,475.31 crore identified for DRR/river management and NPR 51.54 crore for debris management. These two figures alone sum to more than the NPR 5,187.34 crore originally reported as the full cross-cutting recovery need on 11 September (Bhadra 26), an inconsistency worth confirming with NDRRMA rather than treating either figure as superseding the other.

  3   HEADLINE FIGURES  

  4   CASUALTIES AND MISSING  

The 40-person rise in the death toll is driven mainly by Nuwakot’s district count, which jumped from 203 to 236 (+33), rather than Rasuwa (199 → 203, +4) where Upper Trishuli-1 physically sits. This is a striking allocation and likely reflects how recovered workers are administratively registered rather than where they were found, but the report doesn’t explain the mechanism. The deceased-breakdown shift tells a consistent story: the male count rose by 36 (549 → 585) while female count held flat, consistent with a predominantly male hydropower workforce among the newly processed remains.

Missing fell by 89 (5,875 → 5,786), entirely attributable to a drop in Nuwakot’s “people from other districts” component (1,179 → 1,090); the Rasuwa and foreign-national components are unchanged. As on previous days, this reads as ongoing data verification rather than a real change in who is missing.

  5   SEARCH AND RESCUE AT HYDROPOWER SITES  

• Rasuwagadhi, Langtang, Chilime: All three confirmed stood down or with no findings; Langtang and Chilime remain formally concluded per the site inspections reported on 18 September.
• Upper Trishuli-1: The cumulative recovery total is confirmed at 31 bodies from Adit 3, with roughly 2,000m of tunnel cleared through steel-cutting. 13 of the recovered bodies were scheduled for transport from Adit 3 to Trishuli today (20 September). Steel-cutting and search operations continue.
• Trishuli 3A: No findings; the recurring rainfall-driven soil blockage at the tunnel entrance has again been cleared.
• Trishuli 3B: Unchanged. Office building foundation exposed 2m below river level; residential structures A1, A2, B1, B2 and D still not located. Excavation now focused around the powerhouse wall area.

  6   DEAD BODY MANAGEMENT AND FORENSIC PROCESSING  

• Of 1,451 total bodies recovered, 1,292 are stored underground (unchanged from yesterday) and 111 have been handed to identified families, though the missing-persons note elsewhere in the same report still cites 110 as the deduction figure, a minor internal inconsistency.
• 1,292 + 111 accounts for only 1,403 of the 1,451 total, a gap of roughly 48. This is consistent with the Upper Trishuli-1 bodies still being transported out of the tunnel rather than a data error.
• DNA samples: 1,286 from remains, 1,997 from relatives, now consistent between the dashboard and narrative text for the first time in two reports.
• Lab totals unchanged: 1,949 samples at the Nepal Police Central Forensic Science Laboratory (Samakhusi), 1,728 at the National Forensic Science Laboratory (Khumaltar).

  7   INTERNATIONAL SUPPORT: SAR AND FORENSIC TEAMS  

(SAR nations table restated unchanged from 19 September; forensic personnel breakdown newly refined)

Forensic-lab personnel are now broken down by lab: at NPCFSL, 10 Indian experts (7 DNA, 3 support) and 2 Korean DNA experts currently active (Korea’s total presence fell from 6 to 3, with a note that 2 remain working); 2 Singaporean fingerprint experts have returned home. At the National Forensic Science Laboratory, 9 Indian experts (6 DNA, 3 support) and 15 Chinese DNA experts (based at NAST) remain active. New this round: 3 US fingerprint experts are listed as already returned home, the first mention of US personnel in this series.

  8   ROADS, ELECTRICITY, COMMUNICATIONS AND WASH  

Roads, Communication and most Electricity content is a verbatim restatement of 19 September: Krishnabhir two-way traffic holding since 17 September, Shital Bazaar still one lane with blasting underway, Bidur–Betrawati still at 9.2 of 10km, and the electricity restoration gap unchanged at 86 households across two Gosaikunda RM wards. Fuel reserves (23,000L petrol, 60,000L diesel, 9,000L aviation fuel at Nuwakot Station) and cooking-gas figures (180 cylinders to Rasuwa) are also unchanged from yesterday.

WASH carries one new figure: cumulative aviation fuel consumption from Nuwakot Station for SAR and relief flights now stands at 150,000L, the same figure disclosed yesterday, suggesting no further consumption has been logged in this cycle. A more complete Number of Helicopter Flights table appears for the first time, giving a daily sortie count from 26 August through 19 September and a new cumulative total of 1,838 flights, a broader figure than the Nepal-Army-specific cumulative tracked in recent days’ dashboards, likely reflecting all-agency air operations rather than Nepal Army alone.

  9   EDUCATION AND HEALTH  

Both sectors are fully unchanged from 19 September: 35 temporary learning centres, 2,359 student kits, 8,509 cumulative holding-centre health services, 8,066 EMT cases, 11,251 cumulative MHPSS services, 4 forensic teams/12 personnel, 160 persons with disabilities identified. The Nepal Army medical team’s treatment count also holds flat at 3,999, the first day without an increment after a steady run of small daily rises. No dedicated Food Security section appears in today’s report, a gap relative to several recent days that carried one.

  10   COORDINATION TIMELINE  

(published in full for the first time)

NDRRMA has for the first time consolidated its full record of coordination meetings since the disaster began: an urgent briefing and the first Monsoon Command Post meeting on the day of the flood itself (Bhadra 10, 26 August), a National DRRM Council meeting and Council of Ministers meeting the same day, a meeting with MPs and local representatives from affected areas, the 35th DRRM Executive Committee meeting on Bhadra 11 (27 August), formation of 18 Mobilization Teams from Bhadra 12 (28 August), further Executive Committee meetings (36th, 37th, 38th) through Bhadra 25 (10 September), a Prime Minister-chaired high-level review on Bhadra 25 (10 September), a meeting with the National DRR Forum and the Rasuwa DDMC on Bhadra 30 (15 September), and a running series of joint Central-Rasuwa-Nuwakot-Dhading command post meetings continuing into Ashwin (most recently Ashwin 3, 19 September).

  11   ONGOING RISK AND INFORMATION GAPS  

• The death-toll jump is concentrated in Nuwakot’s district count rather than Rasuwa, where Upper Trishuli-1 is located; the allocation mechanism isn’t explained and is worth confirming directly with NDRRMA.
• Bodies handed over to families is cited as both 110 and 111 within the same report.
• The cross-cutting/DRR recovery figures (NPR 9,475.31 crore + NPR 51.54 crore) don’t reconcile with the originally published cross-cutting total (NPR 5,187.34 crore); treat the newer, more granular figures as provisional pending clarification.
• The Education/health damage split in today’s RDNA detail (11 fully/7 partially damaged schools) differs from the 13 fully/5 partially damaged split published on 18 September for the same 18-school total.
• Today’s new cumulative helicopter-flight total (1,838) is not clearly reconciled against the Nepal-Army-specific cumulative tracked in recent dashboards; treat the two series as covering different scopes rather than contradicting each other.
• No Food Security section appeared in today’s report; RRN should not assume relief food distribution has paused, only that this report didn’t refresh that data stream.