Formula 1 has agreed to re‑introduce Boost Mode in wet races for the rest of 2026, a move aimed at reducing sudden power spikes that drivers said were unsafe. The change limits the system to a flat power output that merely fills gaps as cars slow on straights, keeping closing speeds lower when visibility drops.

The FIA’s World Motor Sport Council met in Macau to ratify the tweak, citing safety after drivers complained the original boost made wet laps too unpredictable. The council also approved a split Heat Hazard rule, letting teams decide whether to use cooling vests or extra ballast for sprint and main races separately.

Alongside the wet‑weather change, the board set the 2027 power split at 58‑42 between combustion and electric energy, moving to 60‑40 by 2028. They will also trim race distances by one or two laps at venues like Monza and cut reconnaissance laps to keep the cars’ evolution manageable.

Drivers will now experience a more predictable power curve in rain, while teams can plan ballast or vest strategies ahead of each event. The FIA stresses continuous dialogue to fine‑tune the sport’s balance of safety, performance and sustainability, ending the season with clearer rules for wet racing.