Fiona plowed into Puerto Rico on Sept. 18, about five years after Hurricane Maria also knocked out all power on the Caribbean island.

After battering Puerto Rico and the Dominican Republic, Fiona turned north and slammed into eastern Canada on Sept. 24, leaving more than a third of Nova Scotia without power.

Nova Scotia Power, a unit of Canadian energy company Emera Inc (EMA.TO), said that about 4,200 customers remained without power early Thursday.

PowerOutage.us said that about 82,000 customers were without service in Puerto Rico Thursday afternoon, down 118,000 from early in the day, based on information from LUMA Energy, which operates the island's grid.

That pace of restoration - though slow - was faster than after Maria when almost all 1.5 million customers had no power for a week. At that time the now bankrupt Puerto Rico Electric Power Authority (PREPA) was still operating the grid.

It took PREPA about 11 months to restore power to all customers, but Maria was a much more powerful storm than Fiona.

Maria hit Puerto Rico in 2017 as a Category 4 hurricane with winds of 155 miles (249 kms) per hour (mph), while Fiona hit as a Category 1 storm with winds of 85 mph.

LUMA Energy said it restored service to 1.407 million, or about 96% of all customers by early Thursday and expects to return power to 90% of customers in the hardest hit areas by the end of the day, so long as sufficient generation is available.

LUMA is a joint venture owned by units of Canadian energy firm ATCO Ltd (50%) and U.S. energy contractor Quanta Services Inc (PWR.N) (50%).

Puerto Rico is restoring power to homes more quickly in the wake of Hurricane Fiona than after Hurricane Maria five years ago, when it took months before the island fully recovered.