Should have a database of all healthcare providers with a voluntary assigned territory for emergency care designated in advance. Since I have never been contacted I know this does not exist. Included should be all alternative health care providers such as acupuncturists etc. since in a major emergency ALL care could be critical. Necessary for participation is a suspension of liability for providers when the disaster is designated to be major by the authorities.
Another idea is to promote a Neighborhood Watch type of organization to assist in neighborhood emergency support during a major disaster event.
In a major event, government agencies are overwhelmed, so the citizenry should be organized to assist, which they often do any way but in a DIS organized fashion. Turf wars should not be allowed to conflict with this mission.