Analysis of Urban Heat Island Effect, Heat Stress and Public Health in Colombo, Sri Lanka and Shenzhen, China

Human health, energy and comfort are determined by the climate that remains in physical environment. Regarding urban climate, few studies assess heat island effect, stress, public health as geographical representations. This study seeks to fill this gap selecting Colombo, Sri Lanka, Shenzhen, China, comparatively, two coastal cities with different conditions. We quantified compared effects of waves their impacts on effect urbanization islands (UHI). Heat-related issues have been calculated using Wet-Bulb Globe Temperature (WBGT) index. The Urban Heat Island (UHI) was analyzed Land Surface (LST), created based Landsat images obtained 1997, 2009 2019. A rapid increase temperature humidity creates an uncomfortable environment both cities, but apparent differences can be observed climatic phenomena. During summer (June August), prevailing atmospheric condition Shenzhen makes a “Very severe stress” Heatstroke highly likely. Nevertheless, seven months (November April) found “Comfortable” without having any heat-related injuries. However, Colombo has never classified throughout year. Out twelve, five (April August) When considering expansion UHI, fast than Shenzhen. Consequently, more expansion, it stressful city. Our findings highlight comparison between conditions under processes. Therefore, is imperative these risks respond effectively.