One of North America's five Great Lakes; outlet to the Atlantic via the Saint Lawrence River.
Canadian wildfire smoke is spreading toward the Great Lakes and Northeast, pushing air quality into unhealthy ranges. Officials warn residents to stay indoors, wear masks where needed, and prepare cooling options as heat intensifies.
Canada has vowed dollar-for-dollar retaliation starting September 8 after the US imposed 50% tariffs on about $20 billion of Canadian goods. Ottawa is warning the move will test sovereignty and economic resilience, while Ontario threatens further actions. The fight comes amid broader US pressure on manufacturing and supply chains.
The United States has publicly considered renaming Lake Ontario to Lake America as part of escalating trade tensions with Canada. President Trump has warned of potential economic actions, echoing a past executive order to rename the Gulf of Mexico. Canada and Ontario vow to respond with measures that could target electricity and minerals.