Latest high-resolution forecasts from the ECMWF and Met Office converge on a 33–34°C peak for Milan on July 3, driving the near-even 37.5% and 35.5% market shares for those bins. Persistent subtropical high pressure over the western Mediterranean favors southerly flow that advects warmer air masses northward across the Po Valley, while clear skies and light winds allow strong daytime insolation and limited mixing. Urban heat-island effects in central Milan can add 1–2°C locally compared with rural stations. Minor model spread in 850 hPa temperatures and the exact timing of any weak frontal passage create the tight clustering around 32–34°C; updated runs from Arpa Lombardia or the next ECMWF cycle will likely refine the precise maximum.