That won't work. Remember the Cop from LaHaine who pulled a gun against Vince to kill him. Who believes these elements of society will in a climate crisis pull out their social skills, please?
The same attitude of that extreme alien with a gun exists since 45 ever stronger in French society and they will cause trouble. How many must live in a nation that a thug like that man can get a badge... what you think?
If Paris, or any other major town, faces sever storm floodings the people need to help themselves and not await help. This means the town and republic must not create lines of order and hierarchies of whom orders whom, but create an environment in which the people can help themselves overlooked by the military taking down anti-social elements, such as a looting Cop or abusive citizen to trial.
Traffic lights must be turned off, dangerous zones labeled by radio and signs, water depths communicated, underground parking locked up, electricity turned off and metro access granted free of charge on all elevated routes leading out of the dangerous zones.
The rest is a larger project to which first needs to be understood which areas will face floods by which reasons. Storms or continuous heavy rain onto soaked up soil are two different yet connected causes. Which areas can use sealed houses to await the flood passing and which need large channel and damp projects?
Adjust to fit, don't again order to rule.
