While sport has historically relied on predictable seasonal cycles, the escalating climate crisis is introducing a level of volatility that our current infrastructure was never designed to handle. From submerged stadiums in Brazil to ‘waterfalls’ in the stands of Old Trafford, the outliers are becoming the new baseline. As Taleb himself noted: “We need to be hyper-conservationists ecologically, since we do not know what we are harming now. That is the sound policy under conditions of ignorance.”

The Shift from ‘Black’ to ‘Green’ Swans

In the financial and environmental sectors, a new term has emerged: the Green Swan. Unlike the unpredictable Black Swan, a Green Swan is a climate-related event that we know is certain to happen, even if its exact timing remains elusive. In sport, we are seeing these manifest as structural paradigm shifts—events that don’t just delay a game but break the existing model of how the sport is organised and played.

Consider the 2026 Milan-Cortina Winter Olympics. This month, the Games have served as a case study for the ‘snow squeeze’. With natural snowpack in the Alps at critical lows, organisers have been forced to produce over 3 million cubic yards of artificial snow. This is no longer a supplement; it is the entire foundation of the event.

In February 2026, a coalition of 141 Olympic and aspiring winter athletes published an open letter calling on the International Olympic Committee to cut ties with fossil fuel sponsors, warning that climate change is already reshaping the landscapes on which their sports depend. As the athletes wrote: “We believe it is a contradiction to celebrate human achievement while being funded by the industry that threatens the fundamental conditions, from reliable snow to safe temperatures, upon which all Olympic sports depend.”

Training venues are becoming less reliable, competition calendars increasingly fragile and many traditional winter sport locations may struggle to remain viable by mid-century.

For winter sport, climate volatility is no longer theoretical. It is already changing where and how competition takes place.

North America: The Humidity Threshold and the 2026 World Cup

As we look toward the FIFA World Cup later this year, the data is stark. Ten of the sixteen host venues across the US, Mexico, and Canada are at risk of hitting 35°C (95°F) on the Wet-Bulb Globe Temperature (WBGT) scale. This is the literal limit of human adaptability where the body can no longer cool itself through sweat.

This isn’t just “unpleasant weather”; it is a Black Swan for athlete safety. FIFA is already exploring unprecedented contingencies, including midnight kick-offs or shifting matches into climate-controlled indoor domes. Yet even domes offer no absolute guarantee. In 2024, record heatwaves in Phoenix, Arizona, saw the air conditioning systems at Chase Field struggle to maintain safe internal temperatures, proving that our “technological fixes” have a breaking point.

Europe: When Football Meets the ‘Waterfall’

In the United Kingdom, the traditional image of “football in the rain” is being replaced by something far more destructive. The intensity of flash storms has increased to the point where 20th-century drainage and roofing are becoming obsolete.

The sight of “waterfalls” pouring from the roof of Old Trafford during recent Premier League seasons highlighted a systemic failure. According to a 2025 report from Climate X, one in four major UK football grounds is now at high risk of flooding by 2050. Chris Boardman, Chair of Sport England, issued a blunt warning in late 2025: “Environmental sustainability and sports participation are two sides of the same coin, without the former, we will lose the latter.”

Oceania and Africa: The Geography of Sport Loss

For island nations, the threat is existential. In Fiji and Tuvalu, rugby pitches, the cultural heartbeat of the region, are suffering from saltwater intrusion. High tides now push seawater up through drainage pipes, killing the turf and corroding stadium foundations. This is forcing a migration of sport “inland and upward,” a relocation that few clubs can afford.

Similarly, Southern Africa is caught in a “drought-to-deluge” cycle. In early 2026, catastrophic floods in Mozambique and South Africa halted national leagues. Major venues like Cape Town Stadium are now pivoting to “water-neutral” operations, capturing every drop of rain as municipal supplies become unreliable.

Asia and the ‘Nocturnal’ Sport Economy

In Southeast Asia, the “Green Swan” is the heat. In 2025, major events like the Shanghai Masters and athletics championships in Tokyo saw athletes retiring due to heat stress that researchers described as “physically impossible.”

The result is a forced evolution: the rise of the nocturnal sports economy. Across Singapore, Thailand, and parts of India, outdoor leagues are increasingly moving kick-off times to 9:00 PM or later. The traditional afternoon sports window is effectively closing in the tropics, creating a massive shift in broadcasting rights, fan engagement, and stadium operations.

Oceania: The ‘Force Majeure’ in Wellington

One of the most recent and vivid examples of this disruption occurred in February 2026 during New Zealand’s Ford Trophy. High winds and torrential rain across the North Island caused widespread flooding and slips, closing major roads and grounding flights.

The Northern Districts team was physically unable to reach Wellington for their quarter-final match against the Firebirds. New Zealand Cricket (NZC) was forced to declare a “force majeure event,” rescheduling the match and throwing the knockout bracket into chaos. As the NZC statement noted: “High winds have caused turmoil for airlines while a drenching, flooding and slips… has closed roads.” This is the reality of modern sport: a “quarter-final” decided not by tactics, but by the logistics of a changing planet.

The Legal Reckoning: When ‘Force Majeure Meets Forseeability

This growing volatility is beginning to raise a deeper question for the sports industry: who bears the risk?

Many broadcasting, sponsorship and hosting agreements rely on force majeure clauses, contractual provisions designed to excuse performance when extraordinary and unforeseeable events occur.

But as climate science improves, the concept of “unforeseeable” becomes harder to defend.

Extreme heat, flooding and wildfire risk are increasingly documented and modelled years in advance. When disruptions occur in locations where those risks were already known, legal arguments about ‘unforeseeability’ may become more difficult to sustain.

This emerging intersection between climate risk and international sports contracts is already being discussed within the arbitration community.

The issue will be explored during a panel discussion at California International Arbitration Week in San Francisco, moderated by sports and entertainment arbitrator and mediator Stephen Townley, examining how climate-driven disruption may reshape contractual risk across global industries alongside how disputes in this sector might best be resolved.

Talking ahead of the conference to Global Sustainable Sport Townley, who sits on specialist panels convened both by the Court of Arbitration for Sport and the London and New York office of JAMS, observed: “New Zealand Cricket called it force majeure, and for now that label may hold. But how many more times can severe weather disrupt the North Island before a broadcaster or insurer says: ‘You knew this was coming, why didn’t you plan for it?’

He continued: “What is the best forum to resolve climate-related disputes? The more openly we acknowledge climate risk, the harder it becomes to claim we were caught off guard.”

Townley argues that specialist dispute resolution mechanisms such as mediation and arbitration may offer advantages over traditional court proceedings. In particular, they allow disputes to be heard by experts familiar with both the legal frameworks and the industries affected.

This approach is already well established in sport through bodies such as the Court of Arbitration for Sport (CAS), which routinely adjudicates complex eligibility and doping disputes.

For climate-related cases, particularly those involving insurance, infrastructure and multi-jurisdictional sporting events, Townley suggests that similar expertise may prove critical in determining responsibility when extreme weather disrupts competition.

As the distinction between Black Swans and Green Swans becomes clearer, sport may need to reconsider whether the legal frameworks governing major events are still fit for purpose.

Building an ‘Antifragile’ Sports Ecosystem

The challenge facing sport is not simply to survive extreme weather events, but to adapt to a climate system that is becoming more volatile.

Nassim Nicholas Taleb argues that systems should strive not merely for resilience but for “antifragility” — the ability to grow stronger through stress.

For sport, that could mean redesigning event calendars, strengthening stadium infrastructure and integrating climate science into hosting decisions.

It also requires acknowledging a fundamental shift: the climate stability that sport relied upon throughout the twentieth century can no longer be taken for granted.

As Townley summarised: “When a Green Swan replaces a Black Swan, the force majeure clause stops being a safety net and starts being a liability. Sport needs to rewrite the contracts and its dispute resolution process before the courts do it for them.”

The Black Swans may have landed but it is the Green Swans, the systemic transformations already underway, that will have a major impact on the future of global sport.