Reducing Economic Vulnerability to Climate Hazards in China’s Coastal Cities

China’s low-elevation coastal cities face growing compound risks from sea level rise, storm surge, and extreme rainfall, which threaten not only infrastructure but also public health through disruptions to medical services, power outages, and slow productivity recovery, according to a recent analysis published in Science.

The country’s annual losses from natural hazards such as typhoons average about US$76 billion, with hydrometeorological hazards generating large and recurrent economic losses that extend beyond physical damage to include supply chain interruptions and health-related productivity declines.

Current cost estimates often focus narrowly on structural damage and overlook the broader economic shock caused by disrupted healthcare access, prolonged power failures affecting medical facilities, and the long-term health impacts of flooding and displacement, which can delay recovery and increase vulnerability to illness.

Research cited in the analysis indicates that inappropriate development policies exacerbate coastal flood exposure, particularly in regions like the Bohai Sea, where cities such as Dongying have been identified as highly vulnerable due to limited transportation and medical service capacity, low GDP per capita, and inadequate adaptive infrastructure.

Studies show that land subsidence, combined with sea level rise and storm surges, increases inundation risk in low-lying urban areas, putting populations at greater risk of waterborne diseases, mental health stress, and reduced access to preventive care during and after extreme weather events.

To reduce systemic vulnerability that turns typhoons into national economic and public health setbacks, experts recommend improving the accuracy of loss accounting to include health effects, service disruptions, and indirect economic impacts, while strengthening preparedness through adaptive urban planning and resilient health infrastructure.

Policy decisions regarding land use, development, and subsidence control have been found to exert a greater influence on coastal flooding exposure through 2100 than the magnitude of sea level rise alone, underscoring the need for integrated strategies that align environmental adaptation with public health protection.

Without accounting for the full spectrum of typhoon-related losses—including those affecting hospitals, clinics, and community health programs—adaptation efforts may fail to address the underlying conditions that prolong suffering and hinder recovery in affected populations.

Moving forward, aligning coastal resilience initiatives with health system strengthening—such as ensuring backup power for medical facilities, elevating critical health infrastructure, and training community health workers for disaster response—could mitigate both immediate dangers and long-term health consequences of rising climate risks.