By Megan Ewald and Donna L. Roberts, Office of Response and Restoration
Over 8 million people visit Niagara Falls National Park each year, where Lake Erie flows into Lake Ontario. Mackinac Island, where Lake Michigan meets Lake Huron, is also famous for its horse-drawn carriages and natural beauty.
So what would happen if there was an oil spill at Niagara Falls or Mackinac Island? This possibility is why NOAA develops Environmental Sensitivity Index (ESI) maps to prepare for potential oil spill disasters.