Glacial outburst floods aren't a new phenomenon in Alaska, but climate change is scrambling the geography of risk.

Sections of Alaska’s capital city are bracing for the arrival of what could be record floodwaters due to rainwater and snowmelt flowing downstream from a basin dammed by the Mendenhall Glacier.

City officials say the flood threat has ended and credit barriers with preventing more damage from the Mendenhall Glacier outburst.