Each summer in the mountains above Juneau, Alaska, meltwater from the massive Mendenhall Glacier flows into mountain lakes and into the Mendenhall River, which runs through town.

USGS streamgages show flood conditions are now underway, with live cameras providing real-time views on the USGS HIVIS ...

For three years in a row, Juneau has had unprecedented flooding in August from a melting glacier. This year, officials built a levee to protect the city. It seems to have helped, but it's temporary.