The photo below shows a cutting from a large umbrella tree (a Schefflera) that I am attempting to root in water in a mineral water bottle. I've done it before, and it ought to work. The original plant had grown too tall.
The umbrella tree is symbolic of what is going on in Saint-Aignan right now. It won't stop raining. It certainly doesn't feel or look like August outside. Like my cutting, nous avons les pieds dans l'eau — we're ankle-deep in water.
We don't need an umbrella tree so much as an actual umbrella. The weather woman on Télématin just confirmed it.