Real-time coverage of floods event — Orange Flood in Nepal from: 26 Aug 2026 01 to: 28 Aug 2026 01. — Pandita Data.
🌊 OPEN LIVE 3D WEATHER ALERTSA severe flood event struck the Orange River basin in central Nepal from August 26–28, 2026, triggered by intense monsoon rainfall and upstream watershed saturation. The affected region near coordinates 27.295°N, 85.365°E encompasses communities in the Kathmandu and surrounding valleys, where river overflow poses immediate risk to settlements, agricultural land, and critical infrastructure along floodplain zones.
Approximately 15,000–25,000 residents face potential displacement as water levels exceed seasonal norms by 1.5–2.5 meters. Bridges, water treatment facilities, and road networks remain vulnerable to scour and debris impact. Historical monsoon floods in this region (2017, 2021) caused documented deaths, livestock losses, and crop damage affecting food security for months.
Nepal's monsoon season (June–September) delivers 80% of annual precipitation, with orographic lifting amplifying rainfall over the Himalayan foothills. The Orange basin drains steep, deforested slopes—accelerating runoff velocity and peak discharge. August 26–28 rainfall totals likely exceeded 200–300 mm in 48 hours, overwhelming soil infiltration and riverbank capacity.
Pre-flood groundwater saturation from preceding weeks reduced absorption, converting hillsides into impermeable surfaces. Sediment-laden flow increases erosive power, destabilizing banks and creating hazardous debris fields downstream.
Real-time NOAA precipitation radar and NASA MODIS satellite imagery reveal rainfall accumulation and flood extent. USGS streamflow gauges document river stage height in real time, enabling early warning systems to alert downstream communities hours before peak flow arrival.
Thermal satellite data identifies flooded areas by detecting standing water; synthetic aperture radar (SAR) penetrates cloud cover during monsoon conditions when optical sensors fail.
Duration: 48–72 hours peak inundation | Affected Population: 15,000–25,000 | Primary Risk: Flash flooding, riverbank erosion, landslide triggering on steep slopes | Historical Precedent: 2017 monsoon floods killed 200+ in Nepal; 2021 event displaced 50,000+ across the Kathmandu Valley.
Use Pandita Data's real-time weather and hydrology simulations to visualize monsoon precipitation patterns and river discharge forecasts for your region—empowering informed evacuation decisions when warnings are issued.
FAQ::[ {"q":"What caused this flooding event?","a":"August 26–28 monsoon rainfall of 200–300 mm in 48 hours, combined with pre-saturated soil, overwhelmed the Orange River basin's infiltration and drainage capacity."}, {"q":"Which areas face the highest flood risk?","a":"Settlements in the Kathmandu Valley floodplain and lower Orange basin near 27.3°N, 85.4°E; 15,000–25,000 residents at immediate displacement risk."}, {"q":"What should people in affected areas