Make a plan
The most important thing you can do to be prepared for an emergency is to have a plan.
When a disaster strikes, you and your family or flatmates need to know what to do to get through. Phones may be down during an emergency, so you should think about things like:
Where will you meet if you can't contact each other
Who will pick up the kids from school
Who are your neighbours who might need a hand
You can download and fill in a plan, or simply have a family or flat meeting and save your plan as a note in your smartphone.