Interlagos has produced red flags in multiple recent Brazilian Grands Prix, driven by its tight layout, elevation changes, and frequent November rain that turns the surface treacherous and sparks multi-car incidents. The 2024 and 2025 events featured repeated stops from wet-weather crashes and spins, while the circuit posts an 86% safety-car deployment rate historically. Offsetting this, 2026’s lighter chassis, enhanced crash structures, and revised power-unit rules aim to improve stability and reduce failure points, though early-season software glitches in low-grip conditions have already triggered formation-lap interruptions. Trader pricing near 54.5% on “No” reflects the balance between the track’s proven volatility and expectations that the new technical package could limit full red-flag interventions unless heavy rain or a major shunt materializes.