08Crowds, heat and keeping people safe

The short version: Most festival injuries are small - sprains, stomach trouble, blisters - and most of the safety system exists to keep it that way. The rare disasters have a few repeating causes: too many people in too little space, wind on temporary structures, heat, and plans that did not cover what happened. Each major incident left an official report, and those reports shaped today's rules on crowd density, barriers, unified command and weather stops. Drug checking is one of the most contested safety policies, and the law on it differs sharply between the UK, the US and Australia.

How many people per square meter is dangerous?

Crowd safety is measured in people per square meter (one square meter is about 10.8 square feet). The figures below are as given by crowd scientist G. Keith Still, who cites UK event and stadium guidance:¹⁴⁰

Above the upper limit, people stop choosing where they move. Pressure travels through the crowd in waves, which is why investigators have described some disasters as crowd turbulence rather than a "stampede." The Wikipedia account of the 2010 Love Parade disaster reports a 2012 analysis that used exactly that distinction.¹⁴¹ In a crush, the usual cause of death is compression asphyxiation: being squeezed so hard that breathing stops. That was the ruling for all 10 deaths at Astroworld in 2021.¹⁴²

One caution on sources: Still's expertise has been challenged in court. The German court in the Love Parade trial called his expert report "unusable," according to Wikipedia; critics said it ignored possible police mistakes.¹⁴¹ The density figures here are attributed to him and to the guides he cites, not presented as universal law.

What happened at Roskilde in 2000?

On June 30, 2000, nine young men from five countries died in a crowd crush near the front of the Orange Stage at Roskilde Festival in Denmark, during Pearl Jam's set.¹²² A case-study compilation by Working With Crowds gives the surrounding detail: about 50,000 people at the set, heavy rain beforehand, the band on around 10:30 p.m., victims aged 17 to 26, and 26 people injured, 3 seriously.¹⁴³

The festival's own committee reported in December 2000. Denmark published a national concert safety guide in 2002.¹²² A Danish police report to parliament found the band "morally responsible," as reported by ABC News citing NME; Pearl Jam defended its conduct.¹⁴³

The physical changes are still visible. Roskilde rebuilt the Orange Stage area with a larger, taller stage, zoned pits and redesigned escape routes, and introduced systematic crowd monitoring by trained observers.¹²² A Memorial Grove of nine birch trees stands on the site.¹²²

What happened at the Love Parade in 2010?

The Love Parade disaster in Duisburg, Germany, killed 21 people (13 women and 8 men, aged 18 to 38) and injured 652 on July 24, 2010. Unless the court is named as the source, the facts in this item come from Wikipedia's account and are attributed to it.¹⁴¹

According to that account, it was the first time the event was held in a closed-off area, a former freight yard. A 240 m (about 790 ft) tunnel led to a ramp that served as the main entrance and exit. The area's maximum capacity was 250,000; claims about attendance ranged from 200,000 to 1.4 million. About 3,200 police were deployed.¹⁴¹

A criminal trial opened on December 8, 2017, against six city officials and four staff of the organizer, Lopavent. Charges against seven were dropped in February 2019. The trial ended in May 2020 without a verdict, with the court citing minor culpability and the 10-year statute of limitations.¹⁴¹

The Duisburg Regional Court's own press release, dated May 4, 2020, says its 6th Criminal Chamber discontinued the case against the three remaining defendants under section 153 of the German Code of Criminal Procedure, with the consent of the defendants and prosecutors, after 183 days of hearings.¹⁴⁴ The court said any individual guilt was "gering" (minor), because the defendants' actions made the disaster possible only together with many other circumstances, and it pointed to the near 10-year length of the case and the strain on the bereaved and injured co-plaintiffs. The press release itself does not mention the statute of limitations.¹⁴⁴

What happened at Astroworld in 2021?

Ten people, aged 9 to 27, died of compression asphyxiation during Travis Scott's set at Astroworld, at NRG Park in Houston, on November 5, 2021.¹⁴²¹⁴⁵ Capacity was reported as 50,000.¹⁴⁶ About 300 people were treated on site and 25 taken to hospitals.¹⁴²

Houston police released their final report, 1,266 pages long, on July 28, 2023.¹⁴⁵¹⁴² It found that the 56-page event operations plan covered shootings, bomb threats and weather, but not crowd surges. A grand jury returned six "no-bills," declining to indict Scott and five others.¹⁴² Scott pledged almost $5 million to an event safety initiative in 2022.¹⁴⁵

Texas Governor Greg Abbott launched the Texas Task Force on Concert Safety on November 10, 2021, led by Texas Music Office Director Brendon Anthony. Its report, released April 19, 2022, recommended:¹³⁷

• a Unified On-Site Command at events, bringing in the EMS, fire and police agencies that would answer a 911 call
• attendee codes of conduct in ticketing
• venues consulting other venues that have hosted the same artist
• local authorities stopping unpermitted events or events exceeding their permit
• a universal permit template for County Judges, and an online Event Production Guide

Why did the Indiana State Fair stage collapse?

The structure failed in wind it should have withstood under code, and the ballast holding it down was inadequate, according to engineering reports released in April 2012.

On August 13, 2011, a temporary stage roof collapsed at the Indiana State Fair in Indianapolis before a concert. Seven people died, five at the scene, and dozens were injured.¹⁴⁷

Those reports, as summarized by CNN, set out the detail. The National Weather Service estimated gusts of 60-70 mph (about 97-113 km/h). Engineers put the wind at the moment of failure near 59 mph (about 95 km/h), below the 68 mph (about 109 km/h) minimum the structure should have withstood under code. The engineering firm Thornton Tomasetti found the ballast - concrete Jersey barriers holding the structure down - "grossly inadequate." A separate review by Witt Associates found inadequate emergency planning.¹⁴⁷

The lesson the industry took is in two parts: an engineer checks the structure and its ballast against wind, and the event has a written plan saying at what wind speed the show stops and who makes that call.

How many people end up in the medical tent?

Roughly 13 to 17 people per 1,000, going by two peer-reviewed studies, and only a small fraction of them go to hospital. At Glastonbury 2022 that worked out to about 1 person in 75 needing some care and about 1 in 3,300 going to hospital.

The Glastonbury figures come from a study in the journal Prehospital and Disaster Medicine. Of 210,000 people on site (143,000 ticket holders plus 67,000 staff, volunteers and performers), 2,828 were seen by medical services - a patient presentation rate of 13.47 per 1,000. Sixty-four went to hospital (62 by road, 2 by air), a rate of 0.30 per 1,000. The top diagnoses were joint injuries, gastrointestinal problems and blisters. The service ran on 832 medical volunteers, 533 of them clinicians.¹⁴⁸

North American figures are in the same range. A study in the same journal (published December 2018) of four large multi-day North American music festivals over two years counted 10,406 patient encounters across 34 event days, a presentation rate of 16.5 per 1,000, and a transfer-to-hospital rate of 0.25 per 1,000 including non-ambulance transport.¹⁴⁹

City festivals lean on city services. At Boston Calling 2024, Boston EMS logged "close to 800" medical calls over three days, with 23 people transported.¹²⁸

What happens when the weather turns?

Stages close, crowds are told to shelter in place, and sometimes the festival is called off. Wind and rain each have recent cases; heat has its own item below.

• Wind, Belgium, 2011: On Thursday, August 18, 2011, a storm hit Pukkelpop in Kiewit, near Hasselt, in about 10 minutes, with about 60,000 on site by the organizer's estimate. Tents collapsed and trees and scaffolds fell.¹⁵⁰ Five people died; the festival was put on hold, then canceled the next day. Overloaded phone networks slowed emergency services, which later built their own network for internal communication.¹⁵¹
• Wind, Las Vegas, 2025: On Saturday, May 17, 2025, winds of 20-30 mph gusting above 40 mph (about 64 km/h) closed several stages and all rides at EDC Las Vegas; most reopened around 10:45 p.m.¹⁵²
• Rain, Nevada, 2023: Burning Man (August 28 - September 4, 2023) received up to 0.8 inches (about 20 mm) of rain in 24 hours, two to three months' worth. Participants were told to shelter in place, the gate and airport closed, and only emergency vehicles moved. More than 70,000 people typically attend. One death was under investigation by the Pershing County Sheriff.¹⁵³

A shelter in place order means stay where you are rather than try to leave - on a playa of mud, the safer choice.

What did Woodstock '99 teach festivals about heat?

That drinking water has to be easy to get when it is hot, a point today's UK guidance makes directly.

Woodstock '99 opened July 23, 1999, at the former Griffiss Air Force Base in Rome, New York, with "some 250,000" people, according to HISTORY.com. The tarmac reached "over 100 degrees Fahrenheit" (about 38 C), water bottles cost "$4 apiece," hundreds were treated for heatstroke and dehydration, and three people died.¹⁵⁴

The Associated Press, reporting on July 25, 1999, gave "90-degree-plus" temperatures (above 32 C) and said nearly 1,000 had been treated for heat exhaustion and dehydration, citing promoter John Scher. Scher said: "There's lots of free water here," pointing to sprinkler "rain rooms."¹⁵⁵ The two accounts disagree on how easy water was to get, and both are on the record.

The Purple Guide, the UK's event safety guidance, says "It is essential to make sure that drinking water (aka potable water) is available on site," with hot weather singled out.¹²⁷

Heat is still a working problem in the US. At Bonnaroo in Tennessee in June 2024, The Tennessean reported an average high of 93 F (about 34 C), heat indexes in the triple digits, and medical tents across the campgrounds treating heat-related illness throughout the weekend; it gave no case count.¹⁵⁶

What can I bring, and why are bag rules so strict?

Rules vary by festival and change by year, so the current official FAQ is the only reliable answer. Boston Calling shows how much they move. In 2018, Boston 25 News reported a 12 x 12 inch bag limit, small clear plastic bags allowed, no backpacks, metal detectors at the entrance, and a banned list that included weapons, illegal substances, tobacco and lighters, squirt guns and misters, laser pens, professional cameras, cans and canteens, chairs, strollers, bikes, umbrellas, totems, walkie-talkies and pets.¹⁵⁷ By 2023, WBUR reported a bag limit of under 6 x 9 inches, with one factory-sealed plastic water bottle, an empty reusable bottle or an empty hydration pack allowed.¹⁵⁸ The full 2023 list is in the gate item in Wristbands, cashless and the gate.

Security tightened after the May 2017 Manchester Arena attack. Boston Calling's first year in Allston came days later: Boston police and the contractor RSIG Security inspected the grounds, all bags were checked, and bomb technicians and dogs swept the site. Police Commissioner Bill Evans said: "We'll step up the visibility, the number of officers."¹⁵⁹

In the UK, gate security is licensed. Guidance from the Security Industry Authority (May 2022) says searching people or property to keep out unauthorized or illegal items is licensable work under the Private Security Industry Act 2001, as is guarding; in licensed areas, where alcohol or regulated entertainment is provided, it needs a door supervisor licence.

Stewarding - directing people to seats, toilets or first aid - does not need a licence, and neither do unpaid volunteers.¹⁶⁰ (How festival volunteering works is in Waste, carbon and the town next door.) UK festival lists focus on items more than bag sizes: Radio X's guide to Glastonbury 2025 lists bans on fireworks and sky lanterns, knives, drones, lasers, glass, personal generators and pets other than assistance dogs, and notes that police search for drugs and confiscated items are not returned.¹⁶¹

Is drug checking legal at festivals?

It depends on the country, and in Australia on the state: drug checking is legal in some places, restricted in others, and argued over everywhere. Drug checking (often called pill testing) is the chemical testing of a substance to tell the person who handed it in what it contains. This guide reports the policy and both sides; it gives no advice on use. For health information, go to DanceSafe in the US, The Loop in the UK, or your local official health services.

UK. In 2023 the Home Office introduced a last-minute licence requirement for on-site testing, reported to cost over £3,000, and The Loop, the UK nonprofit that runs festival drug checking, could not operate at Parklife that year. In January 2024 The Loop opened the UK's first regular drug checking service in Bristol. In May 2024 the Home Office said it would allow licensed testing at "leading festivals" under "strict conditions"; The Loop received the first licence and returned to Parklife in 2024.¹⁶²

Supporters quoted include The Loop, which says changing drug markets make current information important; Parklife's Jon Drape, who called testing "a cornerstone" of the festival's harm reduction strategy; and Manchester night-time economy adviser Sacha Lord, who called it "life-saving."¹⁶²

US. DanceSafe was founded in 1998 by Emanuel Sferios and has 17 chapters in the US and Canada, according to Wikipedia. Its festival booths offer literature, water and earplugs; it has sold drug-checking kits since 1999, and it offers on-site testing only after coordinating with promoters, because some laws can hold organizers liable.¹⁶³ The law usually named is the RAVE Act, a 2002 bill reintroduced in 2003 as the Illicit Drug Anti-Proliferation Act. Drug Policy Facts, an advocacy-leaning reference site, cites penalties of up to $250,000 and 20 years, and reports that checkers name promoters' fear of liability as the main barrier, with some booths approved and then refused on the day.¹⁶⁴

Australia. Policy is set state by state and has moved in both directions:

The arguments, as attributed: Minns framed the NSW trial as a way "To reduce harm and save lives," while also saying "there is no safe consumption level of drug use."¹⁶⁶ In NSW, opposition leader Mark Speakman's Coalition had rejected a pill-testing recommendation, and independent MP Helen Dalton raised concern that testing may increase use.¹⁶⁵

In Queensland, the Royal Australian College of General Practitioners (RACGP) and AMA Queensland opposed the ban, and a University of Queensland evaluation (June 2025) found 57% of samples contained only the expected substances. The RACGP report does not state the government's own rationale.¹⁶⁷ One source's headline called Victoria's program "permanent"; its text described an 18-month trial after which the service would become permanent, so the trial description is used here.¹⁶⁵

Since then, NSW has made its program ongoing. On September 2, 2026, NSW Health announced AUD 4.3 million to continue drug checking at up to 15 festivals a year from October 2026; it said more than 1,800 people used the trial service, about 1,500 samples were tested, and the University of Sydney's independent evaluation found the trial "effective," with fewer urgent drug-related hospital presentations and ICU admissions than in earlier years at the same festivals. Health Minister Ryan Park added that drug checking is "not a silver bullet."¹⁶⁸

In Victoria, the health department still described the service as an 18-month trial as of February 2026; it reported more than 1,400 samples tested the previous summer, about 11% not what people expected.¹⁶⁹ In Queensland, Health Minister Tim Nicholls defended the September 2025 ban by saying the government "has a zero-tolerance approach to illicit drugs" and that drug checking services "send the wrong message to Queenslanders."¹⁷⁰

In Boston

Boston Calling is the local case: on Sunday, May 26, 2024, attendees described dangerous crowding during Hozier's set, and Mayor Michelle Wu said EMS transfers that day far exceeded the other days.¹⁷¹ For 2025, the festival merged two stages into a rotating stage system, revised its site map and added water stations.¹²⁸ Wikipedia estimates Sunday attendance at about 40,000, against about 16,000 on Saturday.⁹ The medical figures are above; the dispute over how many people were there is in What happened at Boston Calling 2024, in New England.

Elsewhere in the world

• Denmark: Roskilde's 2000 disaster produced zoned pits, trained crowd observers and a national safety guide (2002).¹²²
• Germany: The Love Parade trial ended in 2020 without a verdict (per Wikipedia).¹⁴¹
• Belgium: After phone networks overloaded during the 2011 Pukkelpop storm, emergency services built their own internal network.¹⁵¹
• UK: A peer-reviewed study of Glastonbury 2022 gives some of the most detailed festival medical data available; drug checking runs under Home Office licence, festival by festival.¹⁴⁸¹⁶²
• US: The Texas task force's unified command model is the main policy response to Astroworld.¹³⁷
• Australia: Drug checking policy differs by state and can reverse with a change of government.¹⁶⁷

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