Emilio Perez Ibarguen|Bridge Michigan

Flint, Michigan, is nearly finished replacing lead pipes 11 years after the water crisis. Financial struggles still cloud the water system's future.

Since the 1990s, cyanobacterial blooms have become increasingly common each summer in western Lake Erie. The blooms are cause by an overabundance of nutrients, namely phosphorus, that spills into the lake off farms.

The Great Lakes temperatures are slightly cooler than typical for this time of year. Overall climate change is causing the lake temperatures to increase.