[The intent of the FH flood hazard district is] to restrict or prohibit uses which may be dangerous to health, safety or property in times of flood, or which may cause increased flood heights or velocities; to require that uses vulnerable to floods, including public facilities which serve such uses, be provided with physical flood protection features at the time of initial construction; to protect individuals from buying lands which are unsuited for intended purposes because of flood hazards; and other public requirements to protect against floods.