Tropical Storm Dolphin brought heavy rain and flooding to eastern China on Monday, prompting warnings of severe landslides across coastal provinces.

The storm's impact underscores the vulnerability of China's major economic hubs to extreme weather, as torrential rains overwhelmed urban drainage systems in cities like Shanghai.

The system made landfall on Sunday as a typhoon before weakening into a tropical storm. At its peak, the storm packed maximum sustained winds of more than 90 mph [1]. The resulting deluge caused significant flooding on the streets of Shanghai and surrounding areas.

Local authorities took aggressive measures to mitigate casualties. More than 1 million people were evacuated or moved to safety ahead of the storm's arrival [3]. Despite these efforts, the intense rainfall triggered widespread warnings for landslides, and severe flooding in the region.

Transportation networks suffered major disruptions. Nearly 950 flights were grounded in Shanghai [3], while other reports indicated hundreds of additional flights were canceled across the region [4].

The storm's movement across the east coast continued to cause instability through Monday. Emergency officials remained on high alert as the system moved inland, monitoring the risk of further flooding in provinces already saturated by the initial landfall.

More than 1 million people were evacuated or moved to safety

The scale of the evacuations and the disruption to Shanghai's aviation hub demonstrate the high operational cost of typhoon season in eastern China. As these storms increase in intensity, the reliance on mass evacuations and the vulnerability of critical infrastructure to flash flooding highlight a continuing struggle to adapt urban drainage to extreme precipitation events.