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NASA's Ecosystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) instrument recorded this image of ground surface temperatures in Houston and its environs on June 20, 2022, at 6:29 a.m. Central Daylight Time. Even just after sunrise, manmade urban surfaces near the city center and transportation networks – streets, roads, and highways shown in red and orange – were significantly warmer than the outskirts by up to 18 degrees Fahrenheit (10 degrees Celsius). Clouds, which are cool compared with the ground, are shown in blue and labeled in the image. Cities are usually war…
