Europe is about to suffer from a meteorological phenomenon called a “heat dome.” This occurs when a massive, stubborn ridge of high atmospheric pressure parks itself over a region. Instead of allowing hot air to rise and escape into space, the high-pressure system pushes the air back down toward the ground.
When the air is forced downward, it compresses. In physics, compressing a gas naturally raises its temperature. The air gets hotter simply by being squeezed closer to the ground.
The sinking air prevents clouds from forming. Without clouds, there is absolutely no shade and no rain to cool things down. The sun beats directly onto the earth with maximum intensity, baking the soil. Then, as the sun bakes the ground, the soil dries out completely. Dry soil heats up much faster than moist soil. This intense surface heat then radiates back up, strengthening the high-pressure system above it and trapping even more heat.
It could well be the case that this imminent heat dome is the first of a number Europe may experience this summer, and its effect will transform F1 racing—as was evident recently in Barcelona.
The Summer Wake-Up Call in Spain
Due to the cancellation of the Bahrain and Saudi Arabian Grands Prix, the Barcelona-Catalunya weekend was the first time this year that the all-new 2026 cars and powertrains experienced a significantly hot weekend. While ambient air temperatures hovered between 27°C and 31°C, the intense summer sunshine pushed track temperatures past 50°C during the hottest parts of the afternoon.
A number of teams were complacent with their strategy and planning for the Sunday race, given the vast tomes of data they have collected over the years which suggest the Grand Prix there is, more often than not, simply a two-stop race.
The circuit features a series of long, high-speed, sweeping corners—most notably Turn 3 and the final corner leading onto the main straight. Because the track is heavily asymmetric with 9 right-hand turns out of 14, it puts an immense, sustained lateral load on the front-left tyre. The front-left behaves as the limiting factor for the entire car; once it overheats or wears down, the car suffers from severe understeer.
Furthermore, the asphalt in Barcelona is older and highly abrasive. The coarse tarmac acts almost like sandpaper on the F1 slick tyres, grinding down the rubber tread via mechanical wear over the course of a stint.
Add into the mix that this year the race took place later than usual in June, and the more extreme track temperatures also led to severe thermal degradation in the tyres. This simply means the internal and surface temperatures of the tyre exceed their optimal working window. The rubber compound essentially begins to break down and feel “greasy,” causing the car to slide more, which in turn creates a vicious cycle of generating even more heat. One final factor is that Pirelli brought a range of tyres a step softer than in 2025, making them inherently less durable.
The Strategy Blunder That Ruined Russell’s Race
Mercedes clearly discussed the various strategy options for their drivers before the race and decided to start pole-sitter George Russell on the medium tyre. This would inevitably lead him to perform a two-stop race with either another set of mediums and a hard tyre to come—or two hard tyre sets back-to-back.
Just seconds before the formation lap began, the teams removed their tyre blankets and all was revealed as to who had chosen which compound of rubber. Lewis Hamilton and Ferrari surprised most others in the field by opting for the soft, red-walled tyre. In an instant, it was fairly evident Ferrari would be delivering an aggressive three-stop race.
Whilst the softer, faster rubber didn’t help Hamilton overtake Russell in stint one, it did create massive panic in the Mercedes strategy room. Russell, of course, was nursing his tyres to some extent, knowing they had to go a lot longer than those Hamilton was running.
Ferrari called in Lewis on lap 12 and gave him a set of hard tyres for his second stint. Immediately he was quicker than Russell, and for some strange reason, Mercedes blinked. To cover off Hamilton, they decided to call in Russell to protect his position on track, and in that moment, they ruined his race.
George told the team over the radio he had been “managing” his tyres, meaning there was more life left in them and he could push harder and go faster if necessary. Yet the die was cast, and Mercedes were to find out that with track temperatures soaring, the aggressive Ferrari three-stop strategy would win the day.
McLaren Caught Out by the Heat
McLaren too were duped into opting for a two-stop strategy, with their lead driver Lando Norris starting behind the Ferrari of Hamilton in fourth on the grid. Whilst Norris hung on to the two silver arrows ahead until Kimi Antonelli suffered an engine failure with just four laps to go, the McLaren proved no match for the Ferrari.
Of course, Hamilton’s win was aided by a perfectly timed Virtual Safety Car, but Ferrari’s decision in the heat and with the soft Pirelli tyres proved to be the correct way to go. McLaren team boss Andrea Stella explained after the race:
“Well, in terms of playing with the strategy from an undercut point of view, we actually tried to stay as close as possible to Mercedes so we could attempt an undercut. In a way, we did it, but it wasn’t successful.
“From that point of view, I think we tried everything that was within our means. If anything, the question in hindsight is whether we should have gone for a three-stop strategy. Which was the right strategy.
”At one stage, when we saw that the hard tyres were performing well in the second stint, we thought the two-stop would be a way, at least, to try to limit Hamilton. But, as a matter of fact, Hamilton was fast—probably the fastest car out there—and I think he would have won anyway. He definitely would have won with the three-stop.”
Looking Ahead to Austria
This lesson from Barcelona and the impending European heat dome is great news for race fans who want to see flat-out racing, not a cat-and-mouse game of tyre management stints. In Austria, the race is typically run with the two hardest Pirelli compounds, where the asphalt and high-speed corners usually force teams to opt for a standard two-stop.
Hamilton and Ferrari may now have changed all that. Expect a variety of aggressive three-stop strategies for the upcoming 2026 Austrian Grand Prix in the Styrian hills as the summer sun burns down.
Would you like to see more TJ13 Formula 1 coverage? Add us to your favourites list on Google to receive trusted F1 news.
The Judge, a nom de plume of an experienced F1 journalist and site founder with long-standing sources across the paddock. With over 30 years of experience in Formula 1 as an insider journalist, I have built trusted connections across the paddock, from race engineers and mechanics to senior team figures. At The Judge 13, I and a handful of trusted colleagues share exclusive Formula 1 news, expert analysis and behind-the-scenes stories you will not find in mainstream motorsport media.
A.J. Hunt is Senior Editor at TJ13, where Andrew oversees editorial standards and contributes to the site’s Formula 1 coverage. A career journalist with experience in both print and digital sports media, Andrew trained in investigative journalism and has written for a range of European sports outlets.
At TJ13, Andrew plays a central role in shaping the site’s output, working across breaking news, analysis, and long-form features. Andrew’s responsibilities include fact-checking, refining editorial structure, and ensuring consistency in reporting across a fast-moving news cycle.
Andrew’s work focuses particularly on the intersection of Formula 1 politics, regulation, and team strategy. Andrew closely follows developments involving the FIA, team leadership, and driver market dynamics, helping to provide context behind the sport’s biggest stories.
With experience covering multiple seasons of Formula 1’s modern hybrid era, Andrew has developed a detailed understanding of how regulatory changes and competitive shifts influence the grid. Andrew’s editorial approach prioritises clarity and context, aiming to help readers navigate complex developments within the sport.
In addition to editorial duties, Andrew is particularly interested in how media narratives shape fan perception of Formula 1, and how reporting can balance speed with accuracy in an increasingly digital news environment.
The Montmelo event has taken place even further into June, so this year’s date range isn’t later than usual for this month, while Pirelli typically brings the softest compounds to the Austrian GP.
However, the heat dome phenomenom is interesting & something I was unaware of, although whether it’ll affected other European rounds is another matter.