If it gets too hot you can offer a bees drinking trough to bees and other insects – and you can simply use the caps of plastic bottles :)
Important: fill the plastic bottle caps only with water, not with sugar or honey water!
Thanks, Brigitte, for the tip!
Links:
Bees Drinking Trough (Bienentränke) (German)
Here at unikatissima:
Entries containing the word ‘plastic bottle’