Florida Sen. Rick Scott said on Twitter that 2,300 FEMA staffers are on the ground in Puerto Rick to support the recovery efforts.

\"FEMA personnel in Puerto Rico are working closely with Puerto Rico Emergency Management Bureau and we have deployed two Incident Management Assistance Teams to the island,\" wrote FEMA spokeswoman Lizzie Litzow on Twitter. \"Additionally, FEMA's Response Operations Cell in Washington,D.C. and Regional Response Coordination Center in New York are Activated to assist with any additional resource needs.\"

The Electric Power Authority reported an island-wide power outage, saying on Twitter that power plants had activated their protection mechanisms and gone out of service.

Authorities said damage had been reported at the Costa Sur power station, and they were evaluating the power infrastructure and urged residents to remain calm. The Electric Power Authority said it hoped it would be able to bring the power back online later Tuesday.

As of Tuesday afternoon, Vazquez planned on going to the power plant to asses the damage her and to \"get a straight answer from energy authorities\" on whether everything will be running soon.

Vazquez told reporters Tuesday afternoon she was unsure when power would be restored.

Aquí información de cómo podemos prepararnos, qué hacer durante y qué hacer después de un terremoto. pic.twitter.com/Ab9kBRnd8y

— Manejo de Emergencias (@NMEADpr) January 7, 2020

Over 300,000 customers do not have potable water, said Vazquez. The U.S. Coast Guard is conducting overflight assessments to identify any potential signs of pollution in the water or damage to the port infrastructure and navigable waterways.

All ports in Puerto Rico and the U.S. Virgin Islands remain open until further notice, the U.S. Coast Guard said in a news release.

\"PHOTO:
Reuters Tv/Ricardo Ortiz
PHOTO: A home is seen collapsed after an earthquake in Guanica, Puerto Rico January 7, 2020. REUTERS/Ricardo Ortiz
>

Almost 350 people are in shelters, with most in one in Guánica, said Vazquez.

Videos posted on social media showed damage to buildings, including a church in the town of Guayanilla with a steeple that collapsed.

Vázquez announced on Twitter that public sector institutions would be closed for the day so workers \"can be with their families, implementing their emergency plans.\" Schools are cancelled until Jan. 13.

In addition to the magnitude 6.5 quake, at least seven other earthquakes were recorded by the USGS as striking Puerto Rico in the early hours of Tuesday. Some of the subsequent quakes measured up to magnitude 5.6.

\"PHOTO:
Ricardo Arduengo/AFP via Getty Images
PHOTO: People pass by a house damaged by a 5.8 earthquake in Guanica, Puerto Rico on January 6, 2020.
>

There is currently no tsunami warning in effect, according to the National Tsunami Warning Center.

\"Of the island's 88 tsunami warning gauges, only 40 plus have been fixed after [Hurricane] Maria. Many are still waiting for funds to be fixed. The USGS will be sending more sensors to the island in the coming days,\" said Vazquez.

Trump was scrutinized for a slow response after Hurricane Maria devastated the island in September 2017 and has feuded with their political leadership.

🔴 Video | Secretario de Estado, @Elmer_Roman_PR sostiene que mañana el Departamento Geológico de los Estados Unidos estará en la Isla instalando sensores adicionales en áreas vulnerables. pic.twitter.com/yNREry0MsJ

— La Fortaleza (@fortalezapr) January 7, 2020

Tuesday's quake comes one day after a 5.8 quake hit the U.S. territory's southern region, which has seen a string of quakes in recent days.

Monday's earthquake collapsed five homes and damaged many other buildings and also caused rock slides and power outages, according to the Associated Press.

ABC News' Jordyn Phelps contributed to this report

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