storing diy supplies

My house gets hot when it's a hot day. Every nook and cranny of the house gets hot. Do concentrates deteriorate in the heat? Where can I store them on those really hot days, when a dark low drawer/cupboard isn't sufficient enough to keep them cool?

Hi all Didnt see a dedicated thread for this - only saw several comments scattered in others What is the best way to store your DIY supplies? As far as I understand flavour concentrates should be kept in a cool dark place. (For example a closed cupboard or drawer in a cool part of the room)...