there is a village, john hick, when the real earth is heated, it looks like lava . this graphic shows a different friend, which is heated on a normal and hot summer day. one of the surfaces is arched and the other is asphalt. it heats up to 40 degrees celsius, and this is while the temperature of the asphalt surface reaches 25 degrees celsius, but on the hottest days, this temperature can reach 82 degrees celsius. this temperature is so high that it burns the skin. during the heat wave in phoenix, arizona, doctors have treated several patients who suffered burns from falling to the ground and from touching surfaces that were much hotter than the cold temperatures that day. warm surfaces give way to the surrounding environment this causes urban areas to become permeable heat islands, such as soil or green grass , which absorb less heat. in urban areas , they are replaced by non-permeable building materials such as asphalt and concrete. they are able to absorb about 95% of the sun's energy. they are areas with a high population . in europe, about half of the schools a