Residents of Atlantic Canadian coast have been warned by authorities
When the storm heads north after defeating Fiona Bermuda, be prepared for impact.
The Canadian Storm Center warned that Fiona - expected to reach the Canadian coast on Saturday morning - was a "historic extreme event".
Officials have warned of the potential for coastal flooding, power outages and dangerous driving conditions.
At least eight people died on Fiona's way through the Caribbean.
"It would be bad," Prime Minister Justin Trudeau said on Friday.
"We encourage everyone to stay safe and listen to local authority instructions and stay there for the next 24 hours."
Tropical storm reminders have been issued in the Atlantic province of Nova Scotia, Prince Edward Island, Newfoundland
The eastern region of the country can receive up to 10 inches (25 cm) of rain, increasing the risk of flash floods.
"The impact will be big, real and direct."