Italian here

We give a lot of shit to our train system (and rightly so) but it actually works quite well, in comparison to our European neighbours.

Bologna to Milano is a very nice line indeed

Max temperatures in Sicily (the hottest region in Italy) reaches 42°C (not 48) in August (not July), so it is quite a difference. It will really be miserable and outright dangerous for a lot of people, not only scary.

Where did you read that? The higest temperature recorded in Italy was 48.8°C in Sicily in 2021. Southern Italy is hot, yes, but whats is considered “farly common” is 40-42°C in August, not July, and not 48°C