A devastating storm, linked to the 2026 heat dome impacting the United States, struck Ottawa on Canada Day, delivering an unprecedented 118mm of rainfall within a single day and leading to widespread flooding throughout Ontario and Quebec. More than 100,000 residences experienced power outages via Hydro-Québec, with approximately 50,000 still lacking electricity days later. Celebrations for Canada Day, including fireworks displays, were canceled across the National Capital Region. A significant recent climate attribution study indicates that the record-setting North American heat dome was rendered 'virtually impossible without fossil fuel-driven climate change.'
