One of downsides of living in a city is that heat can be absorbed in the concrete and pavement of buildings and streets, creating so-called urban heat islands.To find out which areas of the state are most affected, the California Environmental Protection Agency created a first-of-its-kind index tracking temperatures across the state.”We took the first try at quantifying the urban heat island,” explained Gina Solomon, Deputy Secretary for Science and Health with CalEPA.Her team found that the greater L.A. area sees more additional heat than any other region, in part because of how urbanized it is.”We call it not an urban heat island but an urban heat archipelago because it’s like a whole chain of urban heat islands that run into each other,” Solomon said.