Full Breakdown
Juneau Battles Growing Glacial Flood Threat on the Mendenhall River
8/14/2026, 6:04:45 AM
Background and Recent Flood History
The Mendenhall River, which runs through Alaska’s capital, has flooded every year since 2011 as meltwater accumulates in a basin formed by the retreating Mendenhall Glacier. The basin now holds an estimated 17 billion gallons of water, a volume that has increased as regional temperatures rise. In 2023 a home was swept away, and in 2024 roughly 300 homes were inundated. The most recent outburst began in mid-August, prompting emergency managers to order evacuations for residents living near the river.
Infrastructure and Preparedness Measures
Local authorities have expanded flood defenses each year. In 2025, “military-style” Hesco barriers were installed along vulnerable stretches of the river; these proved largely effective. This year the U.S. Army Corps of Engineers added higher barriers, placed heavy rocks on riverbanks to curb erosion, and deployed 43 high-capacity pumps to remove water that bypasses the barriers. The effort represents the most extensive pump deployment in any U.S. community.
Official Statements & Responses
U.S. Army Corps of Engineers Brig. Gen. Clete Goetz highlighted the scale of the pump network, noting it surpasses that of any other U.S. locality. City Manager Katie Koester conveyed confidence in the upgraded defenses, while warning that a breach would create a flash-flood scenario and urging continued evacuations. Hydrologist Aaron Jacobs of the National Weather Service linked the growing water volume to a warming climate that accelerates glacier melt.
Verbatim Quotes
- “There are more pumps in Juneau, Alaska, than any place in the United States,” — U.S. Army Corps, of Engineers Brig
- “The amount of water in the basin, it’s a lot, 17 billion gallons,” — Aaron Jacobs
- “We are feeling more prepared than ever,” — City Manager Katie Koester, said city manager
What It Means for Residents
Despite the expanded infrastructure, the flood’s intensity has risen, and officials stress that preparedness remains critical. Residents like Diane Lohrey, whose home suffered damage in the 2024 event, express anxiety about the effectiveness of the new measures, underscoring the community’s ongoing vulnerability as climate-driven glacial melt continues to swell the river’s basin.
