Interlagos has produced a safety car in 86% of recent grands prix, driven by frequent rain, elevation changes, and incidents at the short-run Senna S section and Turn 3. Unpredictable São Paulo weather remains the dominant variable, with standing water and aquaplaning risks often triggering interventions, as seen in multiple wet-weather races and sprints. The 2026 regulations introduce lighter, narrower cars with revised power units and enhanced safety structures, which could alter handling balance and incident frequency in either direction. Trader consensus at 50% reflects this tension between the circuit’s established disruption patterns and uncertainty over whether conditions will stay dry or if the new chassis prove more stable. Late weather shifts, qualifying incidents, or early-race contact at the tight first-corner braking zone could quickly move the implied probability.