Haha, yeah cucumbers can make anyone feel confident as a gardener! I think ours might finally be on the way out. Pulled a few off yesterday and they seem to be getting quite sad. I'll keep them up to support my cowpeas, though, as I'm pulling off pods daily and saving up the dried beans to get enough to use in a meal.
Heat will definitely zap the life out of the plants in the middle of the day, but as long as they bounce back and get enough water many of them are pretty resilient, right? It is funny to watch even on a cloudy day they can go from limp to perky seemingly immediately as the clouds pass over! Nature sure is fun to watch. :)