Overview

• The National Weather Service reported river levels exceeding last year’s flood crest of nearly 5 meters and forecast a peak early Wednesday morning.
• Authorities issued evacuation warnings overnight on Aug. 12–13 for flood-prone areas as waters from Suicide Basin began surging downstream.
• About 10,000 Hesco barrier units were installed along roughly 4 km of riverbank this season to shield approximately 460 properties, with some seepage and minor street flooding reported but no major damage or injuries.
• Local, state, federal and tribal partners have coordinated emergency response efforts while the U.S. Army Corps of Engineers begins a multi-year analysis of permanent mitigation options, including a potential dam.
• Researchers warn that seasonal glacial lake outburst floods will persist for decades, as the Mendenhall Glacier is expected to continue acting as an ice dam for another 25 to 60 years.