Road blocked is blocked by a mudslide caused by Hurricane Fiona in Cayey, Puerto Rico

At least one person was killed as Hurricane Fiona swept across Puerto Rico on Sunday.

TheNational Hurricane Centerwarned that “catastrophic and life-threatening flooding continues” there as the slow-moving Category 1 hurricane moved over the Dominican Republic on Monday.

Hurricane warnings also remain in effect for Turks and Caicos.

Puerto Rican Gov. Pedro Pierluisi estimated “billions” in damages and alerted residents that rain over the island is expected to continue through Tuesday evening,The Washington Postreported.

Pierluisi said at a news conference Monday that more than 1,000 stranded residents in 25 municipalities had been rescued, and he urged others to remain indoors,The New York Timesreported.

“We are going through a difficult moment but our people are strong and very generous,” he said, according toABC News.

Three people inside a house await rescue from the floods caused by Hurricane Fiona in Cayey, Puerto Rico

The person who died was a resident of Arecibo and attempting to fill his generator with gasoline while the generator was running, resulting in an ignition, officials said, ABC News reported.

Two other deaths of people in shelters were attributed to natural causes rather than the storm.

Monday dawned with more than 1.3 million Puerto Rican customers without electricity, according toPowerOutage.us.

Downed power lines in Cayey, Puerto Rico, which awoke to a general power outage Monday from Hurricane Fiona.Jose Jimenez/Getty

Downed power lines on road PR-743 in Cayey ,Puerto Rico as the island awoke to a general power outage on September 19, 2022 in San Juan, Puerto Rico. Hurricane Fiona struck this Caribbean nation causing extensive damages related to flooding after many towns in the mountainous and southern region received in some cases over twenty inches of rain.

LUMA Energy, the island’s power company, said it could take several days before full power was restored.

For more on this, listen below to our daily podcast PEOPLE Every Day.

Monday saw the reopening of most airports, but Pierluisi said during his news conference that more than 2,000 people remained housed in 128 shelters across the island.

President Joe Bidenapproved anemergency declarationon Sunday, directing federal agencies to coordinate disaster relief.

Flooding during Hurricane Fiona in Villa Blanca, Puerto Rico, on Sunday.JOSE RODRIGUEZ/AFP via Getty

A flooded road is seen during the passage of hurricane Fiona in Villa Blanca, Puerto Rico, on September 18, 2022.

Fiona’s landfall came two days before the fifth anniversary ofCategory 4 Hurricane Maria’s assault on the island, which resulted in nearly 3,000 deaths and about $90 billion in damages.

source: people.com