https://www.scientificamerican.com/article/urban-heat-islands-mean-warming-will-be-worse-in-cities/

If you take a trip from rural Virginia into Washington, D.C., you may notice a change in atmosphere—literally.

Scientists say the “urban heat island” effect, which can raise temperatures in cities by several degrees compared with their surroundings, could be a risk to human health as growing urban populations exacerbate the heating effects of climate change.