The best form of support is being there and listening. Those who are impacted may need additional forms of emotional support including counselling and therapy. Be aware of the services that exist in your community. Supporting others through tragedy and trauma is intense work and if our needs are not replenished, we become exhausted and cease to be helpful. No one person can fulfill all that the situation requires.
Recovery requires a community.
What to do next requires taking direction from where individuals, families and communities are at now. Think about the four areas described above. After some time, safety and many physical needs are no longer an issue. The need for emotional support is ongoing. Have one or two people connected with those impacted get permission to make a list of what needs to be done and then coordinate all those who want to help.