The Greater Bay Area, a highly urbanized and fast-growing region currently faces a rising challenge against heat due to their massive infrastructure. The creation of these urban heat islands (UHI) are due to a lack of vegetation in a region as greater numbers of people and structures accumulate in one area of land. Urban heat in cities such as Guangzhou, Hong Kong, and Shenzhen have led to the health concerns of many citizens ranging from young children to the elderly. This

Rising urban temperatures have become a pressing public health issue across the Guangdong-Hong Kong-Macao Greater Bay Area (GBA), a megacity cluster of over 86 million residents. On 10 August 2026, the Hong Kong Observatory posted 36.9 °C at its headquarters, the city's highest official reading in 142 years of record-keeping, while a weather station in Sheung Shui registered 39.8 °C (Agence France-Presse). Because urban density, industrial emissions, and an aging population c