Boston Mayor Marty Walsh addresses the media outside Boston City Hall on March 15, 2020. State House News Service photo

Boston Mayor Martin Walsh and Gov. Charlie Baker reiterated Friday that officials are not planning a mandatory shelter-in-place order, even as Walsh said changing circumstances could prompt a mandatory lockdown in the future.

Walsh opened his regular segment on WGBH News’s Greater Boston radio show by stressing there are “no plans for a lockdown or shelter-in-place,” a frequent refrain both he and Gov. Charlie Baker have made in recent days amid persistent rumors.

“We are heading potentially to that,” Walsh said about a forced shutdown, but not yet at that point.

The mayor said it is crucial for residents to practice voluntary social distancing as much as possible, though, and said officials are in constant contact about how the state is faring.

At a Friday press conference, Baker repeated his earlier statements that he is not planning to impose a mandatory shelter-in-place order, saying his decision was based on the guidance of medical and public health officials and that particulars vary from state to state. On Thursday, California Gov. Gavin Newsom ordered residents of his state to stay in their homes.

“We have shut down enormous parts of our economy and our communities across the commonwealth, and I’m sure all of you have seen many of the same videos and had the same kind of conversations I have with people who expressed the fact that their once-thriving downtown is now a ghost town,” Baker said. “We are very much in social distancing and shutdown mode here in Massachusetts based on what we’ve already done.”