Luma, the company that operates power transmission and distribution, said bad weather, including winds of 80 mph, had disrupted transmission lines, leading to "a blackout on all the island."
Fiona Becomes A Hurricane, Aims At Puerto Rico newson6.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from newson6.com Daily Mail and Mail on Sunday newspapers.
Hurricane Fiona struck Puerto Rico's southwest coast on Sunday as it unleashed landslides, knocked the power grid out and ripped up asphalt from roads and flung the pieces around.
Fiona has strengthened into a Category 1 hurricane, with sustained winds of 80 mph and gusts of up to 100 mph as it churns in the Caribbean about 50 miles south of Puerto Rico, bringing with it the threats of flooding and mudslides, according to the National Hurricane Center's latest update.