United States: Alaska’s Governor, Mike Dunleavy, on Monday proclaimed an official state disaster declaration in light of what he termed an “impending peril of ruinous flooding” triggered by a glacier lake outburst flood (GLOF) threatening the Juneau region.
This marks the third consecutive year in which the state’s capital, set in the far southeastern frontier of Alaska, braces for severe glacier-induced inundation.
The looming threat emanates from Suicide Basin, a subsidiary basin tethered to the formidable Mendenhall Glacier. Dunleavy emphasized that hydrologic surveillance by the National Weather Service (NWS) and the US Geological Survey (USGS) has confirmed that the current volume of impounded water within the basin has met—or even surpassed—the benchmarks seen during past record-breaking flood events. “A discharge could occur without forewarning,” he stated gravely.
“Such an event would likely deluge the Mendenhall River and submerge adjoining residential quarters in the Mendenhall Valley,” according to CBS News.
According to the NWS Juneau bureau, “The Basin is brimming and continues to overflow its confines… As of 10 pm Monday, no release has yet commenced, though it may be unleashed at any juncture in the coming days.”
This state-level declaration follows earlier emergency decrees and pleas for reinforcement from the city and borough of Juneau, as well as two regional tribal governments. The urgency is underscored by the harrowing precedent set last year when a GLOF wrought havoc across homes, public works, and essential utilities—forcing both state and federal authorities to issue emergency responses.
Footage captured two years prior, circulated widely online, depicted towering evergreens collapsing into the ravenous current of the Mendenhall River as the banks eroded beneath them. In one chilling moment, a house, clinging precariously to the edge, surrendered to the torrent and was swept away, as reported by CBS News.
In a bid to soften the fury of such future onslaughts, Juneau officials, in concert with the US Army Corps of Engineers, have erected over two miles of fortified flood barriers along the river’s course—an attempt to guard lives and livelihoods against nature’s sudden ferocity.