It’s getting increasingly unbearable, even downright dangerous, to walk in cities. That’s because of the urban heat island effect : Buildings, sidewalks, and roads absorb the sun’s energy and radiate it back at pedestrians, raising temperatures far above that you’d find in the surrounding countr...
Source: [Grist](https://grist.org/cities/desperate-for-shade-on-your-walk-theres-almost-an-app-for-that/)