Heat Hazard declared for Singapore Grand Prix Sprint and Race

B1.5.10 Heat Hazard If the O‘icial Weather Service predicts that the Heat Index will be greater than 31.0°C at some time during the Sprint or the Race at a Competition, or at the sole discretion of the Race Director, a “Heat Hazard” may be declared twenty-four (24) hours prior to the scheduled start of the Competition. Once a Heat Hazard is declared it shall remain in force for the Competition. All Competitors will be notified via the o‘icial messaging system. Once a Heat Hazard is declared: a. All components of the Driver Cooling System, with the exception of any cooling medium and any items of a driver’s personal equipment that form part of the system must be fitted. b. At the start of any Sprint session or Race for which a Heat Hazard has been declared, all components of the Driver Cooling System must be fitted. The system must be functional and available for use by the driver, meeting the specific provisions included in Article C14.6.1 of the Technical Regulations for these sessions. However, any driver may elect not to wear any items of personal equipment that form part of the Driver Cooling System. In such circumstance, all other components, including any cooling medium, of the Driver Cooling System must be fitted. In addition, the di‘erence in mass between the driver’s personal equipment normally used and any items of a driver’s personal equipment that form part of the system must be compensated by the fitting of 0.5kg of ballast in the cockpit, such ballast designated for this purpose will be included in sum of masses described in Article C4.6b. c. In accordance with Articles C4.1 and C4.6 the Heat Hazard Mass Increase shall apply. B1.5.11 Rain Hazard