Urban hotspots.

The article discusses the increasing urban heat in Chinese megacities like Hangzhou, highlighting the extreme temperatures experienced during the summer. It also explores the global trend of rising heatwaves due to climate change and the impact on urban populations. The text emphasizes the need for cities to adapt to extreme heat through measures like increasing green spaces, cool roofs, and developing materials to cool buildings without electricity. Additionally, it addresses the social justice aspect of heat exposure, particularly affecting vulnerable groups and lower-income countries. [Extracted from the article]