Could Canada cut electricity to the U.S. and cause blackouts?

Some U.S. regions rely on Canadian electricity, but Canada does not control a switch that can black out the country.

Cross-border electricity dependence is regional, not national. U.S. EIA data show imports from Canada of about 27.2 TWh in 2024. Canadian electricity supplied about 5% of New England demand on average in 2024 but 14% during January 2025, when winter demand peaked; New York's average dependence was lower, although the new Champlain Hudson Power Express increased Quebec-to-New York import capacity in 2026. An abrupt cutoff could create price spikes and grid-management stress in exposed regions, but it would not function as a national U.S. kill switch.

Canada can materially affect some U.S. regions by restricting electricity exports, especially during periods of high demand, but it cannot simply switch off the United States. U.S. imports from Canada were about 27.2 TWh in 2024, a small share of total U.S. electricity supply, although Canadian power can be much more important locally — for example, it supplied an average 14% of New England demand in January 2025.

Canada is an important electricity supplier to parts of the northern United States, and a sudden interruption could matter. New England and New York are physically interconnected with Quebec and other Canadian grids; during January 2025, Canadian imports supplied an average 14% of New England electricity demand. In 2026 the new Champlain Hudson Power Express also increased the ability to deliver Quebec hydropower directly to New York City. In a tight supply period, losing imports could force grid operators to find replacement generation, increase imports from elsewhere, conserve power or take emergency measures.

The claim scales a regional dependency into control over the entire U.S. grid. U.S. electricity imports from Canada totaled about 27.2 TWh in 2024, while the United States generates thousands of TWh domestically each year. Dependence also varies sharply by region and has fallen in New England and New York from earlier levels. Canada does not control one interconnection or switch that can deliberately black out the country; multiple balancing authorities, generators, transmission links and emergency procedures would respond to a loss of imports.

Electricity exports are part of deeply integrated cross-border grids. Exaggerating Canada's ability to trigger massive U.S. blackouts can distort debate about energy leverage, retaliation, infrastructure interdependence, and the risks Canada would face too.

The consequences of a deliberate export cutoff would depend on the region, season, demand level, available generation and other interconnections. A loss of Canadian imports during extreme conditions could create more serious reliability effects than annual averages suggest.

Grid studies or a real-world interruption demonstrating that loss of Canadian imports alone could trigger large cascading U.S. blackouts would materially change the reliability assessment. Current evidence supports regional stress risk, not a national kill switch.

The blackout claim arose through multiple social-media extrapolations after Ontario Premier Doug Ford said electricity exports were 'on the table.' Ford did not make the stronger nationwide-blackout claim, and no single first social post was verifiably recovered, so the AP fact-check was removed from the original-source field.

Canada exports significant electricity to parts of the United States — Supported Abrupt loss of Canadian imports could stress some regional U.S. grids and raise reliability or price risks — Supported Canada has a single switch that can shut down U.S. electricity nationally — False Stopping Canadian exports would by itself cause massive nationwide U.S. blackouts — Not established / exaggerated Regional impacts would depend on timing, system conditions, replacement supply and grid operator actions — Supported

Canada; United States

Canada electricity exports U.S. blackout Ontario power trade

Fact check: Canada can affect regional U.S. electricity markets, but it cannot flip a switch and cause massive nationwide blackouts.