SACRAMENTO, Calif. (AP) — California Gov. Gavin Newsom has ordered a three-week closure of bars and indoor operations of restaurants certain other businesses in Los Angeles and 18 other counties as the state deals with increasing cases of COVID-19. The governor’s order Wednesday also covers indoor operations of movie theaters, wineries, tasting rooms, family entertainment centers, zoos, museums and cardrooms. The governor says the counties encompass more than 70% of California’s population.

THIS IS A BREAKING NEWS UPDATE. AP’s earlier story follows below.

SACRAMENTO, Calif. (AP) — Gov. Gavin Newsom is hinting that he will tighten coronavirus restrictions for California’s nearly 40 million residents as a COVID-19 surge has counties rushing to close down bars and beaches ahead of the Fourth of July weekend.

Newsom planned Wednesday to announce he will “tighten things up” only weeks after loosening his March 19 stay-at-home order and reopening most businesses.

The state requires people to wear masks when they can’t maintain physical distance but public health officials have said lack of social distancing during Memorial Day get-togethers in May may have contributed to the surge.

California has confirmed close to 223,000 infections, a nearly 50% increase over two weeks ago that has been driven in part by the state’s ability to now test more than 100,000 people per day. But more concerning to officials is the steady growth in COVID-19 hospitalizations — a 43% increase in the past two weeks.

Newsom said the state will be more aggressive in enforcing public health orders.

“If you’re not going to stay home and you’re not going to wear masks in public, we have to enforce — and we will,” Newsom said Tuesday.

“You’ve got to keep people from congregating,” agreed Dr. George Rutherford, an epidemiologist at the University of California, San Francisco. But he said it’s up to the public to heed social distancing.

“Just because it’s summer and they feel like having a barbecue with all their friends, it can’t be that way,” Rutherford said. “I don’t know how one legislates that.”

Newsom’s cryptic warning had merchants worried that they will once again have to stop in-person shopping that barely resumed.

“For some of our more independent retailers, if they have to shut down, many of them probably won’t open,” said Rachel Michelin, president of the California Retailers Association. “They barely made it through what was it, 10 weeks that we were closed? That was hard ... I don’t know that they will make it.”

Across the state, many local governments are already tightening restrictions. Counties surrounding the San Francisco Bay have delayed some reopenings as new cases increase. In Los Angeles, officials say they will close beaches and ban fireworks displays in the nation’s most populous county this weekend as it hit a one-day record of 2,903 more confirmed cases and more than 100,000 cases overall. Ventura County, L.A.’s northern neighbor, also planned to shut down beaches beginning July 3.

Half Moon Bay, a scenic stretch of beaches about a half-hour’s drive from San Francisco, said people “inundated” the city over Memorial Day weekend and urged them to stay away.

“Under normal circumstances, Half Moon Bay heartily welcomes visitors — tourism is part of our identity and an important economic driver,” Mayor Adam Eisen said in a statement. ”But coming here this weekend would be reckless and unsafe for the public health. Do the right thing. Stay close to home.”

In the Central Valley, officials in Fresno ordered all bars to close as some hospitals invoked emergency protocols because they were nearing capacity.

“Our cases are not currently under control,” said Dr. Rais Vohra, interim health officer for Fresno County. “We’re quite worried that we don’t have room to expand.”

And in Riverside County, public health officials are seeing an increase in cases among younger people, many of them without symptoms of the virus even though they test positive.

For most people, the new coronavirus causes mild or moderate symptoms, such as fever and cough that clear up in two to three weeks. For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia and death.

Last week, Newsom asked Imperial County to impose more restrictions after hospitals in the county near the U.S.-Mexico border had so many patients they had to transfer some to nearby facilities. On Monday, the county Board of Supervisors approved a plan that would close parks and force some businesses to shut down in-person shopping.

Altogether, California public health officials are closely monitoring 19 counties for outbreaks. Newsom said four more counties could be added to the list by Wednesday.

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Associated Press writers Brian Melley and Christopher Weber in Los Angeles and Amy Taxin in Orange County contributed reporting.