All relevant actors in a community should be involved for developing an awareness of the risk and for starting cooperation. This can be done e.g. by establishment of a coordination circle (“round table”) with the participation of all actors from affected municipal departments, community council, citizens, emergency services, etc. An audit for recording the strengths and weaknesses of the existing precautions against all types of flooding can be an initiative. Creation of a municipal specification sheet "Flood prevention”, improved communication ways, networks or a master plan incl. priorisation of action can be the result of such a process.
Check out the RAINMAN good practice examples:
Sabine Scharfe, Saxon State Office for Environment, Agriculture and Geology