California is preparing for a significantly reduced snowpack, potentially the second-lowest on record, due to unusually high temperatures in March. This situation threatens the state's water supply as the snowpack is essential for replenishing rivers and reservoirs during the dry summer months. The diminished snowpack raises concerns about potential water shortages and increased pressure on water management systems. Climate change is considered a major contributing factor, with more frequent and intense heatwaves leading to earlier snowmelt and reduced overall snow accumulation.