Glaciers in Nepal are shrinking due to climate change, causing meltwater to pool behind unstable natural dams and form growing lakes. If a dam breaks, the resulting flood can destroy villages and infrastructure far downstream. Using satellite images from 1992 to 2024, we tracked how four of Nepal's most dangerous glacial lakes changed. All four grew every year without exception, and one nearly tripled in size. This increase in stored water greatly raises flood risk for downstream communities.