Traders see roughly even odds on a 39–41°C peak for Chongqing on July 15 because short-range models diverge on how long the current heatwave will sustain extreme highs. The city recorded its first 40°C day of 2026 on July 10 amid a broad subtropical ridge, with official readings reaching 41°C shortly afterward; persistence of this pattern through mid-month under weak steering flow and high surface humidity favors another 40–41°C day. Countervailing signals include some ensemble runs showing modest cooling from increased cloud cover or a weak frontal passage around the 14th–15th, which could cap the daily maximum near 37–39°C. Chongqing’s urban heat-island effect and topographic sheltering amplify daytime maxima relative to regional averages, yet day-to-day variability remains high this close to the target date, producing the tight clustering of implied probabilities around the 39–41°C outcomes.