36°C Heat at Monza: FIA Activates Heat Protocol, Drivers Reject Mandatory Cooling Vests

36.0°C. That is the figure the FIA's official weather service forecasts for the second free practice session at Monza. Meanwhile, the FIA's heat protocol activation threshold is 31.0°C heat index. A 5°C difference is not a small number in a sport where every percentage of engine performance is calculated to the smallest detail. And when I look at the data table, I realize this is not just an ordinary weather warning.

This is the sixth heatwave of the 2026 summer in Italy. Six heatwaves in one summer is no longer an anomaly—it is becoming a new norm. And the FIA, through its Article B1.5.10 procedure, has activated the heat protocol based on objective data: the heat index exceeds 31.0°C.

Context: Monza - the track of speed and heat

Monza has always been a special circuit in the F1 calendar. It has the lowest downforce of the season, with approximately 80% of the lap run at full throttle. When ambient temperatures reach 33-36°C, air density decreases, directly affecting downforce and drag. But more importantly, engine intake temperatures rise, forcing manufacturers to consider reducing power to protect reliability.

Monza also has two major heavy braking zones—at T1 and the first chicane. Brake temperatures will rise, and teams will need to adjust brake duct cooling. In hot conditions, managing brake temperature becomes a matter of survival, especially when drivers brake from over 350 km/h down to about 80 km/h at T1.

Technical Analysis: 0.5kg of ballast and the cooling vest

Look at the 0.5kg figure. That is the equivalent weight the FIA has assigned to the cooling vest. Drivers have two options: wear the cooling vest or add 0.5kg of ballast to the car. Technically, 0.5kg on a car with a minimum weight of 798kg is only about 0.02% of the total weight. At Monza, this is worth approximately 0.01-0.02 seconds per lap. Negligible in terms of performance, but it is an important signal about how the FIA is approaching driver health.

What is more interesting is the drivers' reaction. They pushed back against mandatory cooling vests, and the FIA conceded. Why? Because cooling vests in F1 are typically ice-filled or phase-change garments worn under the race suit. Drivers have long complained that they restrict movement, add bulk, and only work for the first 20-30 minutes before the ice melts. In a 90-minute race, that means for the second half of the race they will suffer the heat without support.

But here is the key point: choosing between the cooling vest and ballast is not just a comfort decision. It is a tactical decision. A driver choosing ballast can ask the team to place the 0.5kg in a low position to lower the center of gravity, even if only slightly. Conversely, a driver choosing the cooling vest accepts restricted movement in the first 20-30 minutes to gain cooling later. And at Monza, where races are often decided in the final laps, a driver's focus in the last 10 laps can make the difference.

Race Strategy: Tires and start time

Heat also affects tire strategy. Monza is traditionally a one-stop race, typically medium-hard or soft-medium. But with 33°C at race start, tire degradation will accelerate, especially on the softest compounds. Pirelli typically brings the C3-C5 range to Monza. In 33°C heat, the C5 may not be usable beyond a short first stint, and teams may be forced into a two-stop strategy or a conservative one-stop with medium-hard tires and heavy tire management.

The 15:00 local start time is also a strategic variable. In late summer at Monza, the track surface will have been baking all afternoon. Track temperatures could reach 45-50°C even with 33°C ambient. This favors cars with better tire management and punishes aggressive qualifying-style race starts.

I remember the 2026 season in Qatar, where drivers suffered extreme heat and some nearly collapsed after the race. That was the lesson the FIA learned, and Article B1.5.10 is the result of that lesson. The 31.0°C threshold is not a random number—it was built on data about body temperature and human endurance in racing environments.

Ferrari and home-race pressure

When talking about Monza, Ferrari cannot be ignored. The image of Charles Leclerc in the original article serves as a visual anchor for the story—and that is no coincidence. Monza is Ferrari's home race, and every year, media pressure weighs heavily on the Italian team. This year, that pressure is even greater as high temperatures could affect the car's performance.

Leclerc, with his excellent qualifying ability but often struggling with tire management in the race, will face a double challenge: heat accelerating tire degradation, and pressure from thousands of Ferrari fans in the stands. Data from previous seasons shows Leclerc often loses positions in the middle phase of the race when tires start to degrade—a weakness that could be exploited in hot conditions.

But it is precisely in the harshest conditions that the best drivers shine. I have been following F1 since the 1980s, and I have seen many great drivers show their mettle in the most difficult conditions. Ayrton Senna at Monaco 2026, Michael Schumacher at Barcelona 2026, Lewis Hamilton at Silverstone 2026—those moments were not just about speed, but about endurance and focus in extreme conditions.

Contrarian View: Heat is not a leveling factor

Now, let me offer a contrarian view to the consensus. Many will say that heat is a leveling factor, affecting all teams equally. That is true to some extent. But there is an important caveat: teams' cooling efficiency is not the same. Teams with better cooling systems—larger radiators, better airflow management—will be able to run more aggressive engine modes for longer before thermal limiting kicks in. At Monza, where engine power is paramount, this could translate into a significant qualifying and race-pace advantage.

And here is the point I want to emphasize: the new power units of the 2026 season, with increased electrification and a 50/50 split between internal combustion and electric power, are typically not thermally optimized in their first season. This means the heat at Monza 2026 could expose reliability weaknesses in the new-generation power units—a problem teams may not have fully anticipated when designing them.

Customer teams using the same power unit as works teams but with less optimized cooling integration face a structural disadvantage. This could widen the gap between works and customer teams at Monza, a factor rarely mentioned when discussing heat effects.

Governance and Process: What did the FIA learn from Qatar 2026?

The FIA's concession to driver pressure is an important signal about how the governing body operates. The FIA had long planned to mandate cooling vests but retreated after driver pushback. This shows the FIA is willing to compromise on equipment mandates when facing unified driver opposition, preferring voluntary compliance over confrontation.

The rule-based activation process (heat index >31.0°C) removes discretion. The FIA does not need to decide—the process automatically activates when forecasts exceed the threshold. This is a smart governance design, protecting the FIA from accusations of inconsistency. However, the choice of the 31.0°C threshold is a policy decision that could be revisited if heat events become more frequent.

One notable point is the distinction between "heat index" and "ambient temperature." The heat index incorporates humidity, while teams and media typically report ambient temperature. If these two figures diverge significantly, confusion could arise about whether the protocol should activate. The article reports ambient temperatures of 33-36°C while the activation threshold is a heat index of 31.0°C, creating a data gap.

Impact on the Driver Market and Ecosystem

Although the article does not address the transfer market, this event has indirect signals. The drivers' successful pushback against mandatory cooling vests demonstrates their collective power to influence FIA policy. This strengthens the GPDA's (Grand Prix Drivers' Association) position in broader negotiations about race calendars, race formats, and other issues.

Heat resilience is also becoming a driver valuation factor. As the F1 calendar expands into hotter regions like the Middle East and Asia, and as climate change raises temperatures at traditional European rounds, the ability to perform in extreme heat is increasingly relevant. Teams may begin factoring this into driver selection, especially for endurance-heavy races.

Detailed Risk Analysis

Let me analyze the risks systematically. There are five main risk categories for this weekend at Monza.

First, driver health risk. Although the FIA protocol has been activated, the optional nature of cooling vests means some drivers may choose not to use them. In 33°C conditions, a driver's core body temperature can rise significantly, affecting concentration in the final phase of the race. This is a medium-probability risk with potentially high impact.

Second, engine reliability risk. Monza demands engines run at maximum power for extended periods. High temperatures increase intake temperatures, forcing engine control units to reduce power to protect reliability. This could result in a loss of 0.2-0.4 seconds per lap—a figure large enough to change race outcomes.

Third, tire risk. High temperatures accelerate tire degradation, especially on softer compounds. Teams may be forced to change strategy, switching from one stop to two stops, or adopting a more conservative approach. This creates strategic uncertainty and could lead to surprises.

Fourth, brake risk. With two major braking zones at Monza, brake temperatures will rise. Teams will need to adjust brake duct cooling, but if temperatures get too high, brake fade could occur—a dangerous situation.

Fifth, driver physical fitness risk. In a 90-minute race at 33°C, a driver can lose 2-3kg of sweat. Dehydration and electrolyte loss can affect concentration and reflexes. Drivers with better fitness and heat acclimatization will have an advantage in the final phase.

Conclusion: What is the data telling us about the future?

Looking at the bigger picture, the heat warning at Monza is not just a weather story. It is a signal about the future of F1 in a warming world. Six heatwaves in one summer is an alarming number, and it raises questions about the sustainability of the summer European calendar.

F1 has adapted to major changes before—from the turbo era to the hybrid era, from dangerous cars to strict safety standards. Now, the sport faces a new challenge: climate change. And as always, data will be the guide.

Data is never in a hurry, but people always are. And this time, the data is telling us that the future of F1 will be hotter, both literally and figuratively. The question is not whether F1 will adapt, but whether it will adapt in time.

The empty stands of 2026 exposed a truth: much of what we call character is just noise. Similarly, the heat at Monza 2026 will expose the real differences in cooling efficiency, tire management, and driver fitness—factors that media often overlook when focusing on the dramatic narrative of the race.

At 60, I no longer believe in luck, only in numbers that have not yet spoken. And the numbers from Monza are saying: prepare for a race where the heat will be the 21st driver on track.