Massive wildfires in Canada have recently caused smoke to affect much of the eastern United States. In response, former President Trump has threatened to impose new tariffs on Canadian goods, blaming Canada for not properly maintaining its forests and allowing polluted air to invade the US.

However, this threat has been widely criticized. Analysts argue that imposing tariffs would not improve the wildfire situation and would instead damage both the US and Canadian economies while straining bilateral relations. Furthermore, no existing law authorizes the president to impose tariffs as a response to natural disasters such as wildfires.

The wildfires are attributed to a combination of lightning, weather patterns, and global warming. While Canada may share some responsibility due to its contribution to global warming, the US also contributes significantly on a larger scale because of its bigger population and economy.

A December 2025 study by the US Chamber of Commerce highlighted the substantial harm caused by Trump's earlier tariffs on Canadian aluminum. Similarly, Trump's recent efforts to impose large tariffs under Section 122 of the Trade Act of 1974 were struck down by the US Court of International Trade.

Trump stated, "[w]e are holding Canada responsible for the fact that they are not properly maintaining their Forests, and Brush therein, and the United States is being unnecessarily invaded by filthy, polluted, and unhealthy air."

Despite this claim, experts maintain that tariffs will not make the situation better.

Sources