General Safety - Heat Hazard

In Simple Terms

When it's extremely hot (Heat Index above 31°C), F1 declares a Heat Hazard to protect drivers. Teams must install special cooling system components in their cars, and the cars are allowed extra weight to accommodate this safety equipment.

• Heat Hazard is declared when Heat Index exceeds 31°C or at the Race Director's discretion
• Declaration must happen at least 24 hours before the race
• Teams are required to fit Driver Cooling System components to their cars
• Cars receive a Heat Hazard Mass Increase allowance to compensate for safety equipment weight