The inaugural platform is going up near the Capitol, and the District has repaved Pennsylvania Avenue for the traditional parade. But the crowds huddled together enjoying a concert on the Mall and the celebratory balls that go late into the night? They are less certain. In fact, much remains unknown about how the coronavirus pandemic will change the inaugural celebration that normally transforms the city every four years.

Nine weeks away from the 59th presidential inauguration, officials are under pressure to stage an event that will begin to heal a nation bruised by its deep partisan divides. But they are also operating under the constraints of a health crisis that has upended traditions dependent on massive gatherings and cross-country travel. The result is citywide preparations for a ceremony still shrouded in uncertainty as constituents clamor for tickets and the coronavirus continues to surge around them.

Officials planning the inaugural ceremonies are forging ahead with plans for in-person events Jan. 20, with the understanding that it is easier to scale down operations than scale them up.

“The health and safety of our guests is a top priority,” the Joint Congressional Committee on Inaugural Ceremonies (JCCIC) said in a statement. “This includes the implementation of a layered approach in terms of health and safety measures.”

The joint committee did not lay out what measures it will take against the coronavirus and said it is consulting with Congress’s Office of Attending Physician and other partners on plans.

Sen. Roy Blunt (R-Mo.), who chairs the JCCIC, estimated the crowds at the swearing-in ceremony and parade down Pennsylvania Avenue could be small by historic standards. The event in the past has drawn hundreds of thousands to more than a million to Washington.

“It’s going to be less than 200,000, that’s for sure,” Blunt said.

In the coming weeks, President-elect Joe Biden is expected to launch a Presidential Inaugural Committee that will work with the congressional committee and local partners to rise to a moment defined by competing political and public health needs. The joint bipartisan committee and partnered District agencies have spent the better part of the year preparing for the formal launch regardless of the Election Day outcome.

The joint committee said guest lists and entertainment, including any plans for a concert at the Lincoln Memorial typical for first-term presidents, are still being determined. But officials have already taken steps to prepare for a swearing-in ceremony and a parade down Pennsylvania Avenue.

The National Park Service, the agency that handles permitting for gatherings on federal property, has issued a permit for the construction of the inaugural facilities in Lafayette Square, which includes the reviewing stand where the president watches the parade and a media riser.

There has yet to be a formal announcement about tickets for January’s inauguration. In 2017, tickets were required to enter the Capitol grounds to view the swearing-in ceremony, with parts of the Mall open for those without tickets. That year, the joint congressional committee released tickets in early January to members of the House of Representatives, who distributed them to their constituents.

Some members of Congress who are already allowing their constituents to request tickets for the 2021 inauguration have made it clear in their submission forms that they cannot guarantee tickets, nor do they have available information about the plans for the ceremony given the state of the coronavirus pandemic.

The Walter E. Washington Convention Center, which for years has hosted inaugural balls, will be unavailable for festivities in January. It has been transformed into an emergency field hospital in preparation for a surge in coronavirus cases.

The weather could also be an especially big wild card. In 1909 and 1985, inauguration ceremonies were forced inside by bad winter weather. That may not be an option this time, given the heightened risk of spreading the coronavirus indoors.

Officials with Biden’s transition team declined to comment at this time.

D.C. Council Chairman Phil Mendelson (D) urged caution in inauguration planning given the public health crisis. At a council breakfast this month, he said he had told the mayor’s office that the council opposed the reviewing stand because he thought it couldn’t be safely done during the pandemic.

“I conveyed that we don’t want to see a reviewing stand in front of the Wilson building,” he said, and then asked whether the rest of the council agreed.

Only Trayon White Sr. (D-Ward 8) raised concerns, saying many constituents had already asked him about plans for Biden’s inauguration.

“In this year of social distancing, and with the pandemic numbers looking worse, do we really want a confined space in front of the Wilson Building — where, if I remember correctly, no members showed up last time?” Mendelson asked.

White said council members would be more likely to attend this time.

“I think no members showed up because of who was the incoming president,” White said.

District agencies, meanwhile, are in the process of devising a plan to ensure public safety during the inauguration, no matter its scale. The U.S. Secret Service is the lead agency overseeing the operations of the inauguration. D.C. police are responsible for maintaining order throughout the city.

The District government has historically brought in law enforcement officers from across the country as reinforcement during the inauguration — a tradition complicated this time by the pandemic. Officials with the office of D.C. Mayor Muriel E. Bowser (D) say they are working to determine how to shore up its police force in a way that is covid-compliant.

“We will have to see where we are with the public health guidance and make sure we are able to adhere to that guidance,” said John Falcicchio, Bowser’s chief of staff and deputy mayor for planning and economic development.

Chris Beyrer, professor of epidemiology at Johns Hopkins Bloomberg School of Public Health, said the inauguration could come at a particularly bleak moment in the pandemic. He said the outdoor portion of the event could probably go forward if guests wore masks and practiced social distancing, but balls and other indoor events could turn into superspreader events.

“Unfortunately, where we are is still very much in the steep part of the expansion curve,” Beyrer said. “There’s every reason to think, I’m sorry to say, that the rest of November, December and January are going to continue to be high transmission months.”

It is also still unclear how many demonstrators will come to the District during inauguration week. As of mid-November, six groups had applied for permits to protest or rally for the president-elect between Jan. 14 and 23, according Park Service spokesman Mike Litterst.

None of the permits have been issued yet. Litterst said they will be issued on a first-come, first-serve basis after the Presidential Inaugural Committee decides on the land it needs for ceremonies. It is not unusual, Litterst added, for permits to be doled out the week before the event takes place.

Despite the roiling health crisis and concerns about unrest, tourism officials say they have seen “high interest” from visitors planning to travel to the District to celebrate the inauguration, which they hope could inject new life into the local economy hard-hit by the pandemic.

“Even if covid-19 prevents some of the typical celebratory events, [the] inauguration will hopefully help offset some of the deep economic losses we’ve seen so far,” said Elliott L. Ferguson II, president and chief executive of Destination DC, which promotes the city to visitors.

But Leticia Proctor, senior vice president of sales, marketing and revenue management at Donohoe Hospitality Services, says she has not seen much of an uptick in bookings for late January. Her company, which manages more than 2,000 hotel rooms in the Washington region, typically sells out over inauguration. Normally, by this time, they would have sold 35 to 40 percent of their rooms. As of Wednesday, they had only sold 6 percent of their rooms, a reality that she called “somewhat alarming” for her industry.

Federal officials also hope the event will lift a nation knocked sideways by the coronavirus pandemic and a historically divisive presidential election. The JCCIC said the theme of the 59th swearing-in ceremony will be “Our Determined Democracy: Forging a More Perfect Union” to illustrate “our continued and unbroken commitment to continuity, stability, perseverance, and democracy.”

Jim Bendat, an inaugural historian and author of the book “Democracy’s Big Day,” said Biden’s inauguration could be as significant as those during the Great Depression or following the Civil War as a means of binding wounds and highlighting the transition of power.

“It’s always an important day, but often it’s just a big show,” Bendat said. “There are certain inaugurations we’ve had in our history that have been very significant for a variety of reasons.”

One of the most significant ways the inauguration could make history involves President Trump. The president, who has attacked the legitimacy of the election results with baseless conspiracy theories, has not committed to being part of the ceremony.

White House press secretary Kayleigh McEnany in a Nov. 13 interview did not say whether Trump plans to attend Biden’s inauguration.

“I think the president will attend his own inauguration,” McEnany said. “He would have to be there, in fact.”

Timothy Naftali, clinical associate professor of history and public service at New York University and former director of the Richard Nixon Presidential Library and Museum, said he fears the ritual of the inauguration will become the final political norm that Trump shatters after four years of assaults on the institution of the presidency.

“It’s supposed to be a moment when the political guns fall silent and it’s in that quiet that the next president of the country is given the chance to inspire and start leading us,” Naftali said. “I don’t anticipate Donald Trump giving it to Joe Biden.”

Julie Zauzmer and Mike DeBonis contributed to this report.