**Recent model consensus from sources like Météo-France and extended forecasts positions 34–36°C as the most likely daily maximum range for Paris on August 12, 2026, driving the market’s heaviest volume on those outcomes.** A persistent heat dome and southerly flow of warm, dry air from North Africa and the Mediterranean—exacerbated by record-warm sea-surface temperatures—have sustained elevated temperatures across western Europe. Ensemble guidance shows Paris highs climbing from the low 30s°C on August 10–11 toward a peak near 35–37°C (roughly 95–99°F) by midweek before any cooling arrives. This aligns with the ongoing fourth heatwave of the summer, following earlier extreme events that set new national records in June and July. Traders are weighting the 35°C bin highest because most operational runs cluster the maximum in that narrow window, with modest downside risk to 34°C if cloud cover or a slightly faster trough arrival occurs. Upside to 37°C or above remains limited unless models trend warmer in the final 48-hour updates. Historical August climatology (typical highs near 25°C) underscores how anomalous the current pattern is, but resolution hinges on the official Météo-France observed maximum, which will be finalized shortly after the date.