Water levels in the three upper Great Lakes are wavering far below normal, but Lake Superior, the northernmost lake, is already at a record low for this time of year. The problem comes in the balance between precipitation and evaporation: lakes evaporate in fall and winter. But with too little ice cover to provide precipitation only evaporation occurs.
Amy Robinson reports from WCMU
Copyright 2022 NPR. To see more, visit https://www.npr.org. 9(MDAzMjM2NDYzMDEyMzc1Njk5NjAxNzY3OQ001))
