The annual Big Bay Boom over San Diego will be quiet this year. The skies over Lake Tahoe, home to the Lights on the Lake celebration, will be dark.

Also falling silent will be the IPL Downtown Freedom Blast in Indianapolis; the Patriots Point Blast in Charleston, South Carolina; and the Legacy Blast in Lee’s Summit, Missouri.

Across the country, the coronavirus pandemic has brought to a halt a tradition of summer: Fourth of July fireworks.

As many as 80% of community fireworks displays in large cities and small rural towns have been canceled this year over fear that they would create a social distancing nightmare.

For the 150 companies across the country that thrill spectators with their booming, colorful explosions in the skies, the two weeks around the July Fourth holiday make up about three-quarters of their revenue. The numerous cancellations this year, they say, are taking a significant financial toll on their businesses, many of them family owned for generations.

With July Fourth falling on a weekend, giving communities extra days to host events, “we were looking at a record year,” said James Souza, the fifth generation of his family to operate Pyro Spectaculars by Souza from California. “But of the 400 shows we expected to do around the holiday, we’ll be lucky if we do 40,” he said, noting that he had been receiving daily calls with cancellations or program changes from event planners.

Included in the 40 shows that Souza will produce this year are the Mount Rushmore show in South Dakota and, for the 36th consecutive year, the Macy’s fireworks show in New York City. The Macy’s show has been changed to five-minute displays in undisclosed locations throughout the week that are designed to be watched from outside without leaving home. The grand finale on July Fourth, also from an undisclosed location, will be televised.

A few companies that specialize in large fireworks displays also sell Roman candles, spinners and sparklers for individuals to use in their backyards, a business that is booming this year. But it has also created headaches in cities like New York City, Chicago and Los Angeles, where fireworks are illegal. In Utah, a person setting off fireworks sparked a wildfire over the weekend and forced evacuations of homes 30 miles south of Salt Lake City.

Some of the fireworks display companies have, over the past decade or so, branched out to broader entertainment arenas, creating “oohs” and “aahs” at major and minor league baseball stadiums as well as complex pyrotechnics for rock concerts, music festivals, and indoor basketball and hockey games.

The vast majority of those sports games and entertainment events were also canceled this year. When they ultimately resume, they may initially do so without spectators, making fireworks unnecessary.

“I’ve had days where I’ve lost $150,000 of business from cancellations,” said Roberto Sorgi, the fifth generation of the family that runs American Fireworks in Hudson, Ohio. “We’re going to lose 50 to 75% of our business from the Fourth of July, and there are no clear signs of when concerts or mass gatherings will be allowed again, so we may not have a third or fourth quarter this year. It is a very scary road ahead for all of us.”

Most of the fireworks companies received money through the federal Paycheck Protection Program and the Economic Injury Disaster Loan program. But they said it wasn’t enough.

That’s because the fireworks industry has a ton of upfront expenses. The companies start buying millions of dollars’ worth of fireworks nearly a year in advance and paid hefty insurance premiums this year to cover the planned events.

“I’m sitting on millions of dollars, tons and tons of explosives, that have to be stored very specifically,” Souza said, “which, for us, is in 24 military-style bunkers that we have to lease, and those leases are now at a premium.”

He added: “We’ve maxed out all of our lines of credit. I don’t know how I’m going to cover expenses this year.”

(Da'Shaunae Marisa | The New York Times) Boxes of products at American Fireworks, run by the same family for five generations, in Hudson, Ohio, June 20, 2020. As many as 80 percent of the holiday fireworks displays in large cities and small towns have been canceled because of the coronavirus pandemic.

The industry hopes Congress will earmark $175 million for it in another stimulus bill, if one is passed.

“We’re asking for relief in the next Senate COVID package to address the unique and specific costs to this industry,” said Julie Heckman, executive director of the American Pyrotechnics Association. “Fireworks display companies will be one of the last industries to reopen, and that may not happen until May of 2021.”

Even before the coronavirus outbreak, the year was shaping up to be a challenging one for many in the fireworks industry.

Last summer, the top-of-mind concern for many was whether President Donald Trump would include fireworks in his tariffs on Chinese imports. About 95% of the world’s fireworks are made in China.

Fireworks were eventually excluded from the tariffs, but then China halted manufacturing late last year after an explosion in a factory in Liuyang, where most of the world’s fireworks are made. Then, the coronavirus outbreak in China affected key ports where fireworks are shipped all over the world.

“The first wave of coronavirus hit in China, and we were like, ‘Oh, my God, we’re not going to get any of our products,’ " Sorgi said. “Everyone started to put in backup orders. Then, all of the sudden, they open up, and there’s no way to cancel the orders because they’re already on the boats from China. Every fireworks display company is overstuffed with product.”

And in the days leading up to the holiday, firework display companies say they have been receiving calls from civic leaders, changing where and how the fireworks will be staged in order to maintain social distancing among spectators.

Some, like Seven Springs Mountain Resort in Champion, Pennsylvania, are hosting drive-in fireworks, where visitors park and stay by their cars. Others, like West Palm Beach, Florida, and New York City, are planning to have multiple shows that can be seen from homes.

“We’ve changed a number of the displays to have the fireworks go off at a high level so that people can see the entire display from different locations,” said George Zambelli, the third generation of the family that runs Zambelli Fireworks in Warrendale, Pennsylvania. The Zambelli family has put on shows at the White House for presidents including John F. Kennedy and Jimmy Carter, as well as for the Bush family at its Kennebunkport estate in Maine.

This year, Zambelli said, 80% of the company’s July Fourth shows have been canceled.

Stephen Vitale, the fourth generation of the family to run Pyrotecnico in New Castle, Pennsylvania, said about 160 of the 600 shows he expected to do this Fourth of July would happen.

“The first 15 days of May were incredibly devastating,” Vitale said. “Every call was a bad call, a cancellation.”

Noting that many clients are municipal parks and recreation departments and that an 18- to 20-minute show can cost anywhere from $5,000 to $200,000, Vitale and others are worried about what may happen next year.

“Right now, the cancellations are pandemic driven,” he said. “But next year, I believe it will be more money driven. Budgets are going to get cut.”