Over here in Hungary we had about 9 days in July when the temperature in the shade didn't exceed 30°C. Warmest days were 36-38°C, however the average humidity is significantly lower over here, I believe around 40%. There was one week with weather like this, 60-80% humidity and 32-35°C for several days, it is really rough. I visited the nearby zoo on two warmer days, and nearly every animal spent the day in the shade just waiting. Thankfully most zoos around here are built into areas with a lot of trees and natural shade, so it is easy to avoid the sun for both the animals and visitors.