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    Weather Next Weekend, Aug 4
    • Friday

      Aug 4

      81° /50°F
      Mostly sunny
      • Very Unlikely
      • for a snow day
      • Snow: 0%
      • Ice: 0%
      • Snow: 0 in
      More
    • Saturday

      Aug 5

      81° /56°
      Periods of clouds and sun
      • Very Unlikely
      • for a snow day
      • Snow: 0%
      • Ice: 0%
      • Snow: 0 in
      More
    • Sunday

      Aug 6

      84° /58°
      A thunderstorm possible
      • Very Unlikely
      • for a snow day
      • Snow: 0%
      • Ice: 0%
      • Snow: 0 in
      More
    Los Angeles

    What are urban heat islands?

    July 27, 2017, 3:26:53 PM EDT

    Mirroring their increasing populations, the United States’ current 10 largest cities have gradually become warmer over the past century. more

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