‘On a whole other level’: rapid snow melt-off in American west stuns scientists

Key Points:

• Snow surveys across the American West reveal record-low snowpack levels due to a historically warm winter and an unprecedented March heatwave, with critical basins showing snow water equivalent (SWE) at just 8-24% of average.
• The rapid snowmelt, accelerated by March's extreme heat, has left reservoirs and river basins, including the Colorado River Basin, facing severe water shortages, with major reservoirs like Lake Mead and Lake Powell at historically low levels.
• Water restrictions are already being implemented in several western states as officials anticipate a prolonged dry season, with significant impacts expected on drinking water, agriculture, and outdoor recreation.
• The early and rapid snowmelt is likely to contribute to an extended and intensified fire season, with over 1.5 million acres already burned this year, more than double the 10-year average, raising concerns about worsening wildfire risks.
• Experts warn that climate change is driving these extreme conditions, emphasizing the urgent need for transformative action in adaptation and mitigation to address the increasing frequency and severity of droughts, heatwaves, and wildfires.