Sustained southwest monsoon rainfall triggered prolonged inundation across the Red River Delta near Hanoi from July 15–August 4, 2026, affecting 2M+ residents in Hà Nội, Hải Dương, and Thái Bình provinces.
🌊 OPEN LIVE 3D WEATHER ALERTSA prolonged flooding event began July 15, 2026, across the Red River Delta near Hanoi, driven by sustained southwest monsoon rainfall and upstream watershed saturation. The Green Flood—a seasonal phenomenon in northern Vietnam—poses acute inundation risk to over 2 million residents across Hà Nội, Hải Dương, and Thái Bình provinces through August 4, 2026.
Communities face rapid water level rise in confined river corridors, with embankment overflow threatening agricultural land, infrastructure, and low-lying settlements. Displacement and crop loss are the primary humanitarian concerns; historical Green Floods have affected 500,000+ people in a single season.
The Green Flood results from the Southwest Monsoon (May–September) delivering sustained precipitation to the Red River watershed across Yunnan, China, and northern Laos. Unlike the more catastrophic Red Flood (autumn typhoon-driven), the Green Flood develops gradually as soil moisture peaks and riverine capacity is exceeded over weeks, not hours.
Orographic lifting along the Truong Son Range intensifies convective rainfall upstream, while deforestation and wetland loss in the Mekong headwaters reduce natural water retention, accelerating runoff into confined delta channels.
Pandita's real-time weather module ingests NOAA precipitation grids and USGS streamflow gauges at key points (Hà Nội, Việt Trì). Satellite-derived surface water extent from Sentinel-1 synthetic aperture radar maps inundated areas daily, enabling precise flood boundary tracking across the delta's 15,000 km² footprint.
Northern Vietnam experiences Green Floods in 60–70% of years (1954–2024). July–August inundation is predictable but still claims 100–500 lives annually due to embankment failure and stranded populations.
Monitor live water levels and satellite flood mapping via Pandita Data's weather simulation to assess embankment stability and real-time inundation extent in your district.