The instructions for Evorel oestrogen patches have no lower temperature restriction (and nor do Evorel conti) and nor do the oestrogen patches say they need to be stored at room temperature (although Evorel conti do). It makes sense that products should not reach high temperatures when stored - just as with food - since the active ingredient - estradiol - could be affected. Therefore given the choice and when temperatures are as high as you say - I would store in the fridge if you have no cool place in your apartment, in the absence of advice to the contrary - unless you have been told this by gynae ( I would be surprised given the instructions though, as they should mention this if it is likely to be a problem?) Certainly I can feel the difference in my patches when they are hot - the adhesive is a bit more gooey ( as expected). As I said it may take a bit longer to apply them. Also having said that I would still continue to use your patches - although it sounds like they were at very high temperatures possibly for a few days?
Hurdity x