FIA Announces Wet-Weather Boost Ban for Miami GP Amid Storm Forecast

The FIA has banned the use of the 350kW 'boost' function in wet conditions, effective immediately from the Miami Grand Prix. The emergency rule change, accelerated by a grim weather forecast for the race weekend, aims to prevent dangerous power surges from the new 2026 cars on slippery tracks.

Why it matters:

This pre-emptive ban addresses a critical safety gap in the new regulations before it could be tested in a real race situation. With the 2026 power units delivering instant electrical torque, drivers expressed major concerns about controlling sudden power delivery in the rain, especially during corner exits. The change fundamentally alters wet-weather racing strategy by removing a key overtaking tool available in the dry.

The details:

• The ban is part of wider 2026 mid-season regulation tweaks and specifically inhibits the boost mode "whenever grip levels are reduced."
• It was fast-tracked due to a concerning Miami forecast predicting a high chance of thunderstorms on race day and a lack of conclusive wet-weather data from pre-season testing.
• Uniform Power Delivery: With boost disabled, energy deployment in the wet will be managed via controlled engine maps, creating a smoother and more predictable power curve for all drivers.
• Additional Aero Restrictions: The FIA also tightened rules on 'straightline mode' aerodynamic adjustments in the wet. Drivers will now have only partial control, with reduced front-wing adjustments allowed to maintain a more stable car balance.
• Local Complications: The weather threat is compounded by strict U.S. safety protocols regarding lightning, which could force race delays or red flags if storms hit the circuit.

What's next:

The immediate focus is on a potentially chaotic Miami Grand Prix, where teams and drivers must now adapt their strategies without the wet-weather boost option. This reactive rule change highlights the ongoing learning process with the new-generation cars and sets a precedent for how the FIA may address other unforeseen performance or safety issues as the 2026 season develops.