Healthcare workers transport a patient on a stretcher into an ambulance at Life Care Center of Kirkland on February 29, 2020 in Kirkland, Washington.

The Federal Emergency Management Agency is planning for the possibility that President Donald Trump could make an emergency declaration to bring in extra funds and personnel to assist the administration's coronavirus response, according to internal documents obtained by NBC News.

FEMA officials are preparing for an "infectious disease emergency declaration" by the president that would allow the agency to provide disaster relief funding to state and local governments, as well as federal assistance to support the coronavirus response, according to agency planning documents reviewed by NBC News.

The Trump administration would have to use the 1988 Stafford Act to enable FEMA to provide such disaster assistance. Emergency declarations are most often used in the event of natural disasters but can be used to help manage disease outbreaks.

"To me this is another indication that the president and the White House are finally aware of the gravity of the situation," said Michael Coen, a former FEMA chief of staff during the Obama Administration. "They need to consider all tools available to them and have contingencies for action."

"I actually find this reassuring," said Tim Manning, a former FEMA deputy administrator under Obama. "I hope this discussion has been happening continuously over the last couple of months."

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An emergency declaration would allow FEMA to provide disaster medical assistance teams, mobile hospitals, and military transport, among other kinds of federal support, Manning said.

FEMA's disaster relief fund has a current balance of $34 billion, according to the latest agency update. "It's money that's sitting there and ready," said another former FEMA official, who declined to be identified.

FEMA spokesperson Lizzie Litzow said the agency is currently focused on supporting the Department of Health and Human Services (HHS), which separately declared a "public health emergency" on Jan. 31, allowing HHS to access funds and other resources to aid the government's virus response. "At this time, there isn't anything additional to the HHS public health emergency," Litzow said.

The White House did not respond to a request for comment.

It would not be the first time the federal government has used FEMA's resources to assist in a medical event.

In 2000, President Bill Clinton used a Stafford Act emergency declaration for outbreaks of the West Nile virus in New York and New Jersey, ordering up to $5 million in federal aid to supplement state efforts to combat the mosquito-borne virus.

Emergency declarations are distinct from "major disaster" declarations, which are more far-reaching and are typically used for hurricanes, floods, and other natural disasters.