The Austrian GP heat-hazard race designation has arrived as Europe swelters through a heatwave that is setting record temperatures in several countries, including the UK. Formula 1 has used the label before, but Austria is the first event this year to be placed under it.

Why Formula 1 uses the heat-hazard label

The rule was introduced last year, when the Singapore and United States Grands Prix were run under the same designation. It exists for the obvious reason that racing a Formula 1 car in extreme heat is not exactly a spa treatment, unless the spa also requires fireproof underwear and 300 km/h concentration.

Cockpit temperatures can climb above 40C. Drivers are already wearing multiple layers of fireproof clothing, plus a balaclava and helmet, which makes overheating a serious concern rather than just an uncomfortable afternoon at work.