What happened: A red flag was deployed during the Monaco Grand Prix weekend when a Cadillac caught fire on the circuit. The track stoppage occurred as McLaren marks their 1000th Grand Prix in the Principality.

Why it matters: Fire incidents mandate an immediate halt to all track activity to ensure driver safety and allow marshals to extinguish the flames. This interruption costs the entire grid valuable run time on a tight street circuit where building rhythm is essential for qualifying.

What to watch: Marshals will remove the stricken Cadillac and inspect the track surface for fluid or heat damage before resuming the session.