America’s hottest city is working to avoid getting even hotter, starting with its streets. As heat waves across the country continue, Phoenix, Arizona, is covering black asphalt roads with a gray sealant that reflects the sun rather than absorbing heat. Mayor Kate Gallego told CBS News that the sealant, which has so far been used on 73 miles of city street, reduces the temperature of asphalt by 10 to 12 degrees. “Our residents say they can feel the difference,” she said.
Climate change has made the heat in the desert locale even more pronounced — compared to 1970, the average summer temperature is 3.6 degrees Fahrenheit higher and there are now 12 more days above 110 degrees each year. In addition to “cool pavement,” Phoenix is planning to build 100 cool corridors, plant more trees, and try out reflective roofs and cooling sidewalks to combat the rising temps. David Hondula, Phoenix’s director of heat response and mitigation, said: “We could wind up with a Phoenix of the future that’s cooler than the one we have today, even as global warming continues.” |
