A rush of glacial floodwater swept down Alaska’s Mendenhall River on Wednesday morning, prompting evacuation warnings in parts of Juneau, seeping through flood barriers and flowing into a few neighborhoods. The floodwaters, which broke through a dam of glacial ice, are an example of how gradual shifts to the climate are sometimes punctuated by sudden drama that can rapidly reshape a landscape. Last year, hundreds of homes were flooded in Juneau when the river released a glacial

See Full Page