I lived in Munich many years ago, but if the temperature ever went to the high thirties for more than a day we'd expect the end of the world :-)
Speaking from a UK perspective global warming is now noticeable, hot days are hotter and there's more likely to be a heat wave, and that's changed in the last decade.
I assume Germany is the same, many years ago really is different to today.
Come now to south of Germany. We are in the middle of a 10 days heatwave at 35 degC on average.