Ian Sample

Well, the predictions are that this could be the hottest World Cup ever, or if not one of the hottest World Cups ever.

And that has prompted a group of doctors and scientists to write an open letter to FIFA because they're really concerned about the potential for harm to players and even match officials, the referees.

Well, the predictions are that this could be the hottest World Cup ever, or if not one of the hottest World Cups ever.

I spoke to Dr. Oliver Gibson.

He's one of the signatories of this letter, and he's a member of academic staff at Brunel University of London.

And that has prompted a group of doctors and scientists to write an open letter to FIFA because they're really concerned about the potential for harm to players and even match officials, the referees.

He studies the impact of heat stress on human performance.

And I said to him, you know, what is in this letter?

I spoke to Dr. Oliver Gibson.

He's one of the signatories of this letter, and he's a member of academic staff at Brunel University of London.

He studies the impact of heat stress on human performance.

And I said to him, you know, what is in this letter?

They've worked out in about half a dozen of the cities where these matches are going to be played, and we're talking about places like Dallas, Houston, Miami, this wet bulb globe temperature could hit 30 Celsius, and that is brutal if you're

playing football at the intensity that these elites are going to be playing at.

But there's also a concern about what this might mean for the spectacle of the World Cup, for the performance of the players.

They've worked out in about half a dozen of the cities where these matches are going to be played.

And we're talking about places like Dallas, Houston, Miami.

This wet bulb globe temperature could hit 30 Celsius.

And that is brutal if you're

Well, if you think about how the body cools down, obviously it cools down in a bunch of ways, but the main way is through sweating.