The 'urban heat island' effect has made these 10 cities the most heat-intense in the US ktvz.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ktvz.com Daily Mail and Mail on Sunday newspapers.
Ryan DeBerardinis // Shutterstock Urban heat islands are areas within cities that are hotter than their outlying regions, largely due to albedo the tendency of a material like asphalt or pavement to absorb, rather than reflect, heat from the sun. Lac.