Residents in Alaska's capital urged to evacuate over flooding threat from melting glacier
On Tuesday, Juneau officials said on Facebook that there was a glacial outburst at Suicide Basin, a side basin of the Mendenhall Glacier above Juneau, according to the National Weather Service.
As the Mendenhall Glacier recedes in a warming climate, the basin has released glacier lake outburst floods that have caused an overflow of water along Mendenhall Lake and River every year since 2011.
'The basin is releasing and flooding is expected along Mendenhall Lake and River late Tuesday through Wednesday,' Juneau officials wrote in Tuesday's post. 'Residents are advised to evacuate the potential flood inundation area.'
The Anchorage Daily News reported that more than 1,000 residents and businesses were placed under the evacuation alert.
The National Weather Service has issued a flood warning until Thursday at 8 a.m. local time. The Mendenhall River is currently at 9.85 feet, and the major flood stage for the river is 14 feet. The service warned the river will crest at 16.6 feet at around 4 p.m. Wednesday.
This forecasted flooding could break a record, which was set when the Mendenhall River crested at 15.99 feet in August 2024.
Alaska Governor Mike Dunleavy has issued a disaster declaration in response to the imminent glacial flood threat.
'By issuing this declaration before the flood occurs, we can position state resources and personnel in advance to support local and tribal governments in their efforts to protect lives, homes, and essential services,' Dunleavy said in a statement. 'Our goal is to act early to reduce impacts and preserve community safety.'
The imminent record-breaking flood this summer follows two years of severe flooding, according to a press release from Alaska's Department of Military and Veterans Affairs, which announced Dunleavy's declaration.
After last year's devastating flooding, which damaged homes and public infrastructure, two miles of flood control barriers along the Mendenhall River were installed.
'I really do feel like we are prepared this year,' Juneau Manager Katie Koester told The Washington Post. 'I'm really hoping that we'll have a success story by Thursday.'
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