A hurricane warning has been issued for the Dominican Republic and Puerto Rico

HAVANA — The eye of newly formed Hurricane Fiona neared Puerto Rico’s south coast on Sunday

Already causing an island-wide power blackout and threatening to dump “historic” levels of rain.

Forecasters said the downpour was expected to produce landslides and catastrophic flooding, with up to 25 inches possible in isolated areas.

“It’s time to take action and be concerned,” said Nino Correa, Puerto Rico’s emergency management commissioner.

Destroying the island’s power grid and causing nearly 3,000 deaths.