Current forecasts from regional models indicate Shanghai's August 4 maximum will likely peak near 34–35°C under the influence of a strong subtropical high-pressure ridge, which promotes subsidence and clear skies conducive to daytime heating. Recent observations show surface temperatures already climbing into the mid-30s amid high humidity that limits nocturnal cooling, while ensemble guidance from the European Centre for Medium-Range Weather Forecasts and China Meteorological Administration reveals modest spread driven by potential afternoon convective clouds or brief showers that could shave 1–2°C off the peak. Historical August climatology places typical highs around 32–33°C, making this episode slightly above average and sharpening trader focus on precise threshold resolution. Updated model runs and official briefings over the next 48 hours will refine the outcome.