More than 700 homes in the town of Joshimath, in the Indian Himalayas, have developed cracks, forcing hundreds of newly homeless residents to evacuate.
In southwestern Pennsylvania, eight locks and dams that for decades helped barges move goods along the Allegheny, Monongahela and Ohio rivers will in a few years also generate enough power for 75,000 homes.
Drought and dams have pushed Tonle Sap into dangerous decline, threatening its swamp forests and the fish nurseries there that provide most of the nation's protein.
