Pipes of geothermal water can be installed under sidewalks and roads to keep them from icing over in winter, like this sidewalk in Klamath Falls, Oregon.
In southern Oregon, when snow falls on this downtown of brick buildings and glass storefronts, it piles up everywhere but the sidewalks. It’s the first sign that this timber and ranching town is like few others. A combination of hot rocks and water like those that created Yellowstone’s geysers have been tapped by the city to keep the sidewalks toasty since the early 1990s. They also heat downtown buildings, kettles at a brewhouse, and greenhouses and keep the lights on at a college campus.