On July 27, 2026, a sudden and intense rainstorm in Hanoi caused widespread flooding across several streets, with some areas experiencing water levels as high as one meter. The downpour began around noon, quickly overwhelming the drainage system and leading to significant traffic disruptions.

Reports indicate that streets in central Hanoi, such as Nguyen Thai Hoc, saw water levels rise to approximately 20-30 centimeters, causing vehicles to slow down significantly. Many motorbike riders were cautious, opting to navigate slowly or even divert onto sidewalks to avoid submerged areas. At one point, the water level reached halfway up the wheels of some motorcycles, prompting some riders to turn back.

In the alley of 42 Giang Van Minh, residents faced severe flooding, with water levels reported between 80 centimeters to one meter. Locals struggled to navigate the flooded streets, often using their feet to probe for open manholes and avoid potential hazards. One resident, Mrs. Tinh, noted that heavy rains often lead to flooding in her area, stating, "Every time it rains heavily for just 20-30 minutes, we experience deep flooding. Just two days ago, the water reached inside my house. Fortunately, it hasn't flooded my home today."

The flooding also affected local businesses, with shop owners attempting to push water out of their stores to prevent damage. As the rain subsided, many businesses remained quiet, with customers hesitant to venture out in the poor conditions. In front of Hoe Nhai Hospital, patients and staff waited for the waters to recede before continuing their journeys, with some patients in wheelchairs needing assistance to navigate through the flooded areas.

To ensure safety, authorities set up barriers in areas with deep water to deter vehicles from entering. Environmental workers were deployed to clear drains and manage the flooding, while some daring motorbike riders attempted to cross the flooded streets, hoping to make it through before their engines stalled.