Hurricane Fiona devastated Bermuda with heavy rain and wind early Friday, heading for Canada’s Atlantic coast.
Officials in Canada have urged residents of the country’s eastern provinces to prepare for coastal flooding and power outages.
Fiona is expected to reach the coast of Canada on Saturday morning.
Florida also faces a hurricane threat after a separate tropical cyclone formed in the Caribbean Sea.
Tropical Depression Nine is in its early stages and moving on a path that could take it to Florida as Hurricane Hermine next week, according to the National Hurricane Center.
Hurricane Fiona, now a Category 3 storm, had already wreaked havoc in Puerto Rico and the Dominican Republic earlier this week, with many still without power or running water.
Five people have died in the Caribbean: one in Guadeloupe, two in Puerto Rico and two in the Dominican Republic.
In Bermuda, Hurricane Fiona forced schools and offices to close.
The National Hurricane Center has said Fiona’s maximum sustained winds can reach 215 km/h.
Canadian officials and meteorologists are urging residents to brace themselves for the storm’s impact hitting the Atlantic provinces of Nova Scotia, Prince Edward Island and Newfoundland.
The region can receive up to six to ten inches of rain, increasing the risk of flash flooding.
Shelters have been prepared in Halifax and Cape Breton in Nova Scotia for people to take cover from the storm.
“Every Nova Scotia should prepare,” John Lohr, the minister responsible for emergency preparedness in the province, said at a news conference on Thursday.
Mr Lohr added that the storm could be “very dangerous”.
“The storm is expected to bring severe and damaging wind gusts, very high waves and storm surges along the coast, intense and dangerous rainfall and prolonged power outages,” said Mr Lohr.
Severe hurricanes in Canada are rare, as storms lose their energy once they hit colder waters in the north and become post-tropical instead. But pressure in the region is expected to be at an all-time low as Hurricane Fiona hits and gives way to a stronger storm.
Nova Scotia was last hit by a tropical cyclone in 2003 with Hurricane Juan, a Category 2 storm that killed two people and severely damaged buildings and vegetation.