In 2020, Phoenix coated 36 miles of roads to fight extreme heat; surfaces became 12°F cooler at noon, but heat exposure for pedestrians rose 5.5°F
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August 24, 2026
Phoenix coated 36 miles of roads to fight extreme heat Painting city streets with a light-coloured, reflective coating can cool the asphalt underneath, but it can also increase heat exposure for people walking on the road. That unexpected trade-off…