FIA Declares Heat Hazard for Austrian Grand Prix

The FIA has declared an official heat hazard for the Austrian Grand Prix after forecasts indicated the heat index will surpass 31°C during Sunday's race. Race Director Rui Marques notified teams that all cars must be fitted with driver cooling systems this weekend, but the optional nature of the cool vest has generated sharply different opinions up and down the paddock.

Why it matters:

This is the first heat hazard declaration of the 2026 season, a regulation introduced in response to the extreme conditions at the 2023 Qatar Grand Prix that left multiple drivers requiring medical attention. With temperatures at the Red Bull Ring expected to climb through the weekend, the rule places physical endurance and thermal management at the center of the competitive picture.

The details:

• Under Article B1.5.10 of the FIA F1 Regulations, the trigger is a forecasted heat index above 31.0°C. Teams must install systems that circulate cooled fluid through a fireproof vest worn beneath the driver's race suit.
• Drivers may opt out of wearing the vest, but must carry 0.5kg of ballast in the cockpit to offset the weight.
• Divided opinion: Oscar Piastri intends to use the vest after testing it last season, acknowledging it helps when working properly but warning that a system failure would be worse than not wearing it at all.
• Isack Hadjar rejected the equipment entirely, citing excess tubing inside the cockpit and claiming the vest only stays cool for about ten minutes before becoming ineffective. He added that he expects the car to reach its limits before the driver does.

What's next:

The paddock will get its first real look at the cooling setups during Friday practice before conditions peak later in the weekend. Following previous deployments at Singapore and COTA in 2025, the Austrian Grand Prix will offer a fresh verdict on whether the mandate provides genuine protection or merely adds another layer of complexity to an already demanding sport.