(Bloomberg) -- The shooting attack at a Las Vegas concerton Sunday night that killed at least 58 people is the latest in aseries of massacres reshaping the live-events industry.

The attack by a solo gunman at an outdoor country-music concerton the Las Vegas Strip was reminiscent of a bombing in May at anAriana Grande show in Manchester, England, and another tragedy lessthan two years prior, when gunmen opened fire at a rock concert inParis.

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At least 515 other people were injured in Nevada after thesuspect perched in a high-rise room in the Mandalay Bay Hotel &Casino and unleashed a barrage of gunfire on the crowd below. Hewas later found dead.

Videos of the attack showed screaming concertgoers scramblingfor cover as the clack-clack-clack of what sounded like anautomatic weapon can be heard in the background. In the aftermath,events organizers will once again be forced to revisit afundamental debate about how — or even if — they can keepconcertgoers safe.

Dangers of a determined killer

Sports and concert venues like stadiums and arenas have alreadybeefed up security with metal detectors and wands to check fans asthey arrive. Sunday’s incident showed that a determined killer canget around such preparations and that the live-events industry hasto do more.

“This isn’t something many people would have anticipated,something on this scale at an outdoor event,” said ChrisRobinette, president of Prevent Advisors, which works on securitypreparations with sports teams and event facilities. “This issomething we have to think about and address.”

Besides concerns about the welfare of fans, the industry hassignificant financial interest at stake. The top 100 toursworldwide generated $4 billion to $5 billion a year in revenue from2011 to 2016, according to Pollstar. Las Vegas depends on tourismas the linchpin of its economy, and the strip is a fabledthoroughfare flanked by flashy casinos and showrooms that havehosted the likes of Elvis Presley, Jennifer Lopez and BritneySpears.

Vulnerable in Vegas

The shooting underscores a vulnerability for Las Vegas, as thecasino industry shifts from one largely dependent on slot machinesand blackjack tables to becoming more of an all-aroundentertainment experience. MGM Resorts International has been aleader in this trend. The casino company opened the T-Mobile Arenafor concerts and sporting events and redesigned the front of itsNew York-New York casino to make it more pedestrian friendly.

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The Route 91 Harvest festival, where Sunday’s shooting occurred,is among concerts MGM has hosted at a venue it operates along theStrip.

“Our hearts and prayers go out to the victims of last night’sshooting, their families, and those still fighting for theirlives,” Jim Murren, MGM’s chief executive officer, said in astatement. “We are working with law enforcement and will continueto do all we can to help all of those involved.”

Mandalay Bay tweeted Monday, “We are in need of certified traumacounselors.”

Vegas tourism

Tourism to Las Vegas hit an all-time high of 42.9 million guestslast year, a 1.5% increase from 2015, and it’s up less than 1% thisyear. The city can look to Orlando, Florida, the site lastyear of what is now the second-worst shooting in U.S. history.After a gunman killed 49 in a nightclub tourism to the city slowed.Hotel room bookings fell and theme-park operators offereddiscounts. Still, the city reported a 3% rise in tourism for theyear to 68 million.

The Global Gaming Expo, a major casino-entertainment industryshow known as G2E, was scheduled to begin Monday and run throughThursday. One panel Monday, scheduled before the mass shooting,focuses on security risks at nightclubs.

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Events at G2E, which attracts 26,000 casino managers and thecompanies that supply them, were going on as scheduled with a fewspeakers canceling appearances on panels.

MGM fell as much as 5.4% to $30.84 in New York, the biggestintraday decline since February. Wynn Resorts Ltd. alsodropped.

Live Nation Inc., which promoted the Route 91 festival, fell asmuch as 2.2% to $42.58. “To think that anyone would want to inflictharm on a gathering of music lovers is beyond our comprehension,”the world’s largest concert promoter, based in Beverly Hills,California, said in a statement.

McCarran International Airport was busy Monday morning withvisitors coming and going to Las Vegas. Transportation SecurityAdministration officials briefly prevented some travelers fromleaving gate areas. An officer at the airport said he didn’t knowthe reason for the delay.

Street closed

Las Vegas Boulevard was closed in front of the Mandalay Bay,Excalibur and the Luxor hotels, all MGM properties,and no one wasbeing allowed in the front entrances. Side streets were blocked offwith yellow police tape.

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Many guests were checking out early, according to Berhane Weldu,a cab driver who had been busy shuttling passengers from the hotelsto the airport. Security was checking the IDs of those entering andleaving those hotels.

“I’ve never seen anything like this,” said Weldu, who has been ataxi driver in the city for seven years. “It’s so sad.”

Elevated cancellations

MGM Resorts is likely to see elevated cancellations over the nextseveral weeks or months and higher security costs, Instinet Inc.analyst Harry Curtis, who recommends buying the stock, said Mondayin a note to investors after talking with management.

“Questions that cannot yet be answered are not typically goodfor a stock price, but we have faith that the U.S. spirit will notbe intimidated by a horrific yet isolated event,” he wrote.

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