Porticoes were used on Greco-Roman temples and popularized for secular use during the Middle Ages in Bologna. They are not a feature of socialist architecture.
Your tribe is so fucked lol. Your shaman has ZERO insights, he's just some regular guy. How'd that happen? None of your people blessed with divine madness?
If you take control of your weight/health and your moods, which is worth doing regardless, you acclimate to heat and it becomes very pleasant. Especially if you are only in Europe on vacation where any urgency or vexation is self imposed