Climate change could make cities 8C hotter – scientists
The projection is based on the worst-case scenario assumption that emissions of greenhouse gases continue to rise throughout the 21st century.
The top quarter of most populated cities, in this scenario, could see temperatures rise 7C or more by century’s end, said a study in the journal Nature Climate Change.
For some nearly 5C of the total would be attributed to average global warming.
The rest would be due to the so-called “urban heat island” effect, which occurs when parks, dams and lakes, which have a cooling effect, are replaced by concrete and asphalt – making cities warmer than their surrounds, the researchers said.