'Tragic but avoidable' - how serious is heat-death risk in sport?

ByDaniel Austin

BBC Sport elder journalist

On Monday, 3 August, Fijian rugby subordinate Saimoni Vunilagi acceptable disconnected from location to bid with his team-mates.

After the session, helium was taken to hospital. A fewer days later, the 26-year-old was dead.

In a connection announcing his death, Japanese 2nd part nine Kyuden Voltex said Vunilagi "displayed symptoms accordant with terrible heatstroke" during the grooming session, adding "despite the champion efforts of the aesculapian team, helium sadly passed away".

Japan, similar the UK, Europe and galore different parts of the world, suffered terrible heatwaves this summer.

By noon connected the time Vunilagi became ill, the somesthesia successful Fukuoka - wherever Kyuden Voltex are based - had risen to 35C. The humidity was much than 75%.

In the weeks before, the regular precocious was betwixt 32 and 37C. It had been a period since the regular precocious was beneath 30C.

No ceremonial origin of decease has been publically released, but the nexus suggested by the nine betwixt grooming successful vigor and Vunilagi's decease has caused alarm, fixed the summation successful planetary temperatures and the rising frequence of highly blistery days.

So, however superior a menace is utmost vigor to athletes, what measures could assistance and bash perceptions wrong athletics request to change?

There person been a assortment of heat-related aesculapian incidents during sports events successful 2026.

Tennis players Jakub Mensik and Ekaterina Alexandrova collapsed during matches played astatine much than 30C, and 8 runners had to beryllium taken to infirmary during a marathon successful South Korea successful April astatine which temperatures reached 29C.

Tour de France victor Tadej Pogacar called this year's vigor "dangerous" during the event, portion Matthew Brennan asked "what are we doing?" aft the somesthesia topped 40C astatine the Vuelta a Espana, successful which helium won 5 stages.

This summer's World Cup besides featured arguable hydration breaks astatine each match, which Fifa insisted were introduced to assistance subordinate welfare.

Many sports - including tennis, athletics and cycling - show perchance unsafe levels of utmost vigor utilizing the Wet Bulb Globe Temperature (WBGT), which produces a measurement for vigor accent levels by assessing aerial temperature, humidity, upwind speed, prima space and star radiation.

But immoderate experts judge athletes request greater protection, oregon the hazard of further fatalities volition increase.

"We person seen an summation successful the fig of vigor unwellness events successful rugby and galore different sports astir the satellite successful caller years," says Dr Madeleine Orr - adjunct prof of athletics ecology astatine the University of Toronto.

"People presume we've seen specified utmost vigor earlier and think, 'it was fine, we pushed through, we tin bash it again'.

"That's not needfully existent - the heatwaves we're experiencing contiguous are hotter than the ones successful your childhood, due to the fact that heatwaves are comparative to the section normal, and 'normal' levels person risen."

Though the requirements of each athletics mean the interaction of precocious temperatures tin differ, determination are increasing calls for broad rules to beryllium implemented crossed sports which connection much cast-iron extortion erstwhile things go truly extreme.

"Different leagues person antithetic policies - determination needs to beryllium much of a standardised attack truthful that everyone conscionable knows what to do," says Orr.

"It's akin to lightning - astir radical are acquainted with the thought that erstwhile there's lightning adjacent a sports event, we instrumentality a interruption for 30 minutes and commencement erstwhile it has gone away.

"We request a akin argumentation connected vigor and we request it to use everyplace - it's easier for radical to get down if it's cosmopolitan that erstwhile we get to a definite threshold, we cognize what happens."

One of the large challenges with heat-related illnesses successful athletics is convincing athletes and their coaches to bash what is champion for their health.

"I've got nary uncertainty that a batch of coaches deliberation that vigor regularisation is simply a hindrance," says Christian Day - wide caput of the Rugby Players' Association.

"And it's a pugnacious 1 for the player, isn't it? Because you don't privation to beryllium the subordinate who puts their manus up and says they're not feeling well, oregon that it's excessively blistery to bid connected a definite day. Players request protecting from themselves sometimes.

"It's important for squad unit to person a regulatory fig that they cognize if it hits it, there's nary discussion, you conscionable halt playing.

"It's besides astir educating players arsenic to what signs to look for to place 1 of their team-mates who is struggling successful training."

World Rugby updated its vigor and air-quality guidelines successful 2025, including usage of a vigor accent scale - a measurement from 0 to 250 utilized to find however unsafe blistery conditions are for players, with provisions for h2o breaks and extended half-time periods astatine debased levels of danger, and perchance suspending oregon postponing matches astatine the higher extremity of the scale.

But players walk acold much clip grooming than they bash playing matches.

"If this level of vigor is going to go the norm, past we request cardinal regularisation and governance arsenic to however we assistance clubs negociate their players and however they should respond to these benignant of temperatures," says Day.

"Maybe determination are cases wherever possibly grooming needs to beryllium constricted successful time, oregon doesn't instrumentality spot astatine each that time outdoors.

"It's not a substance of trying to telephone radical retired oregon nutrient problems. It's trying to guarantee the safest imaginable grooming environment."

Pre-season tin beryllium an particularly unsafe clip for athletes crossed sports.

On 5 June 2026, the Japan Rugby Football Union (JRFU) warned clubs heatstroke was an expanding interest during the summer, and told teams information should beryllium the overriding precedence erstwhile readying summertime grooming camps.

Heatstroke is simply a sudden, unsafe wellness information which occurs erstwhile the assemblage overheats and tin nary longer chill itself.

This tin harm the organs, origin the intestines to merchandise toxins and perchance beryllium fatal wrong small much than an hour.

Symptoms see dizziness, nausea, headache, disorder and slurring.

"Heatstroke is 100% preventable, truthful each azygous decease is 1 excessively many," says Orr.

"It's not the lawsuit that athletes tin grip vigor amended due to the fact that of their fitness.

"And the bigger the assemblage the faster it heats up, truthful bigger bodies are much susceptible arsenic well. Moving that wide astir takes a batch of energy.

"So portion yes, nonrecreational athletes are extraordinarily fit, that doesn't prevention them erstwhile the contented of interest is cooling disconnected the body."

Amateur athletes playing for the emotion of the crippled tin beryllium astatine hazard too.

"Whatever the elite level does, we'll spot it trickle down into grassroots," says Day.

"And that's wherefore it's important that the elite level of each athletics sets the close illustration due to the fact that the kids, the players of tomorrow, volition perfectly transcript immoderate they spot their heroes doing."