Concrete, asphalt, and urban heat islands exacerbate the effects of heat waves, according to a graphic that demonstrates how different surfaces heat up during hot summer days. Grass and asphalt can reach temperatures of 40°C (104°F) and 65°C (149°F), respectively, during a heat wave. The absorbed and reflected energy from these surfaces increases the overall air temperature, posing a health risk. Urban development replaces natural surfaces with impermeable structures, creating urban heat islands that experience higher temperatures than surrounding rural areas. Green spaces and vegetation can help mitigate high temperatures, as demonstrated by thermal satellite images of cities. Creating small green spaces, such as pocket parks, can improve quality of life and lower temperatures in cities.
https://www.reuters.com/graphics/CLIMATE-CHANGE/URBAN-HEAT/zgpormdkevd/