SAN JOSE — Bay Area residents will continue to live under stay-at-home directives for several weeks past the early April expiration of the initial regional order, according to officials and sources, dovetailing with an extension of federal guidelines by President Trump to slow the spread of COVID-19.

“In all likelihood, we’ll have another shelter in place order early this week,” Cindy Chavez, president of the Santa Clara County Board of Supervisors, said during a tour of county fairgrounds facilities that will be used to help unhoused people protect themselves from the coronavirus.

Bay Area public health officers who co-signed the country’s first widespread shelter-in-place order, which went into effect March 17 and is set to expire April 7, are in ongoing talks about potentially extending the current order to May 1, according to multiple sources familiar with those discussions.

The counties in the first order were Alameda, Contra Costa, Marin, Santa Clara, San Francisco, San Mateo and Santa Cruz. The counties were joined by the city of Berkeley, which operates its own public health department.

Even if the Bay Area order were to lapse, it would be substituted with an indefinite statewide stay-at-home order issued by Gov. Gavin Newsom on March 20. But local jurisdictions are allowed to have more restrictive rules than the state, and the local health officer talks, sources said, include proposed modifications to allowable outdoor activities and classifications of non-essential businesses, to help resolve ambiguity that arose out of the initial order.

For instance, park systems throughout the state and Bay Area have closed or curtailed access because of people taking advantage, en masse, of exemptions for exercise and constrained recreation. And the local order’s classification of gun shops as non-essential runs counter to other California counties, including Los Angeles.

Chavez’s remarks came on the same day Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, predicted on CNN’s “State of the Union” that the new coronavirus could kill between 100,000 and 200,000 people in the United States, and that millions could become infected.

Later Sunday, President Trump extended federal social-distancing guidelines to April 30 — from Easter Sunday on April 12 — which Fauci said afterward was “a very wise and prudent decision.”

But no one day on the calendar has real meaning on the trajectory of the virus, health experts and sources say.

The length of stay-at-home and social-distancing orders will hinge on whether the peak of infections and hospitalizations has passed; their main purpose is to drastically reduce the number of potential COVID-19 infections and lessen the overall strain on the healthcare system, a concept now popularly known as “flattening the curve.”

Through Sunday afternoon, Bay Area counties had recorded 1,925 cases and 49 deaths among a population of about 8 million people, according to data compiled by the Bay Area News Group.

An extension of the sheltering order should also not be seen as a surprise, as public health experts and officials from across the country were joined by Newsom in saying social-distancing and other restrictions were likely going to be in place for at least a few months.

In a profile published by this news organization Sunday, Dr. Sara Cody, the Santa Clara County public health officer who famously led the multi-county brigade behind the initial stay-at-home order, said county health officials will assess this week how effective the measures have been. But she was unequivocal in saying, “This is going to go on for quite some time.”

Santa Clara County confirmed 55 new cases of COVID-19 on Sunday, bringing the known total to 646, more than twice the 302 cases reported as of March 22, according to data released by the county Public Health Department. San Mateo County’s total reached 277 confirmed cases, though there were no new deaths reported Sunday.

Alameda County had recorded 270 confirmed cases as of Sunday and seven deaths. Contra Costa County reported its third coronavirus death Sunday, and said that 17 new cases had surfaced, bringing its total cases to 175.

San Francisco reported that two more people had died from the virus, bringing that city and county’s total to five fatalities. The latest count of known infections for the city was 340, also more than twice the number reported earlier last week.

Adherence to the stay-at-home order has been met with broad compliance, but ongoing uncertainty remains about where and when people can be out for recreation, as allowed by the order.

Law enforcement has still been conservative with their ticket books when they encounter large gatherings and “non-essential businesses” violating the order, opting instead for warnings rather than the misdemeanor citations and potential business license revocations they are authorized to issue. While some citations have been given out in Santa Clara County, none of them have been criminally charged.

“Those are last resorts for us,” Santa Clara County District Attorney Jeff Rosen said in an interview Friday. “We hope we don’t have to file charges.”

Rosen said a hotline and email address set up by his office garnered 1,500 complaints last week about potentially non-compliant businesses or gatherings, a total that does not include untold complaints made separately to police departments.

He said the majority of calls have been complaints about improper social distancing — too many people too close in line at the grocery store, for instance — that are difficult to assess because they’re often fleeting instances. About a third of the complaints were forwarded to police for follow up.

“While we encourage people to exercise, we encourage them to use common sense in terms of keeping their distance from other people,” Rosen said. “If people are saying, ‘Let’s have a basketball game, a soccer game at the park,’ just ‘No.’ It’s not what the public health order is directing to be done.”

Staff writers Aldo Toledo, Joseph Geha and Julia Prodis Sulek and The Associated Press contributed to this report.