The problem with heat isn't only temperature, but in many places, it's the accompanying humidity. Heat and humidity are energy sapping and drains you of the abi

The problem with heat isn't only temperature, but in many places, it's the accompanying humidity. Heat and humidity are energy sapping and drains you of the ability to do highly focused intellectual work. You pay a price in productivity. I was once working out of the corporate HQ of one of the largest multinational companies in Germany, and despite the modern buildings, the offices had no A/C and it was hot in the summer. Germans are against A/C for various reasons: (1) it's environmentally unfriendly; (2) it's only a few weeks in the summer; (3) Continuous cold air on skin is unhealthy. (4) You get used to it. There are varying degrees of truth here, but for me, it didn't matter: I couldn't do intense focused work. That to me was too huge a cost.